初中七年級數(shù)學(xué)能力檢測解方程組練習(xí)

初中七年級數(shù)學(xué)能力檢測解方程組練習(xí)

學(xué)校名稱：班級：學(xué)號：姓名:

x+5y=4[3m+2n=20

<<

3x-6y=5[4m—5n=19

x+y-5z=12

|3x-5z=6

<y+z-5x=4

"+4z=-15

z+x-5y=8

y=l-x|3(x-1)-43?4)-0

‘5x+2y=8(5(>-1)-XX+5)

〃5x=y+4

3-7-15

〔3x+2y-18=0

3（x+y）-4（x-y）=4

無+丁?8一丁二］

26

y=3x-24x+3y=6

5x+y=42x+y=4

x:y=2:3Js+21=-9

（3ST=1

3x+4y=9

4x-3y=53x-5y=-9

2x-y=22冗+7y=-6

2x+2y=8±+2=o

32

2x-2y=4

2(3x-4)-3(y-l)=43

x+yx-y.

610(x+2)2-(y-3)2=(x+y)(x-y1

x-3y-3x-3y=2

----------------=-1

43

2

—x+3y

2x-3y=723

4x+9y=-1329

x—y=

4*n

1-xx+2i2x+3y=7

x-------=----------1

363x-y=5

x+2y=23x+4y=2

2x+y=42x-y=5

2x4-y=5

fy=|x|-2

2x+y-2_

Ai-J|y=2-3|x|

3

y=3x3(x-l)=2y+7

+2y=18[2(x-2)-2(y-3)=l

山+匕=1

2323

4(x+y)—5(x—y)=2x-y=a(a為常數(shù))

4(x-j-1)=3(1-y)—23x-5z=6

3=2元+4z=-15

123

a+1Z?+2

y+1x+2--------------=()

34

a-3b-3_1

2x-3y-1

"43~~V2

3x+2y2x+yx-y+1'2004x+y=l

-4--5-—6-x+2004y=1

x+1y-1c

m-n=2

32

2m+3z?=14

2x-11-y.

-------+——-=1

32

4(x-y-l)=3(l-y)-2

x=3-4y

xy

3x+8y=5-+-=2

[23

rx—3y=—9

2x-3y=5

，1,

6x+5y=il4》—“=一

2x-y3x+2y=5x+2

平=3

52(3x+2y)=1lx+7

x+y+z=3

4x-2y=14

?x-y+z=7

5x+y=7

3x+5z=25

0.4y+0.9y-5_0.03+0.02y2x+3y=7

2~~0.033x-y=5

x-2y=7

3x+2y5y+12x.

---------=----------=—1

33

rX=y-\,3x-y=2

12x+y=4Ix+2y=10

x-3y=5y=1-3

2x+y=5y-2x=5

2x-y=5x-2y=0

x+y=lx=3y+l

9m-2n=32p-3q=13

4n+m=-1一p+5=4g

3m-2〃=5,3%-5y=7

4m+2〃=94x+2y=5

6x-5y=111lx-9j=12

-4x-4y=7-4x+3y=-5

112

—x+—y=—5x+2y=5a

53.5其中。為常數(shù)）

3x+4y=3a

0.5x-0.3y=0.2

—=I

4m-2〃+5=023

3〃-4m=6

0.4x+0.3y=0.7—x——y+l=O

[llx-10y=1<53*

2x+2y=7

-2x-lly=3c-x-4y=3c+d

*（c為常數(shù)）<（c、d為常數(shù)）

6x+29y=-7c4x+3y=2d-c

3x-2y=6山+0=6

22

2x+3y=174（x+y）-5（x-y）=2

2w-v=-4—“JI—=-3R

23

3w+v=19

7x-8y+4=0

0.8x-0.9y=2

3x+2y=5

6x-3y=2.5

2x—y=8

「x+yx-y

x+1=5（y+2）-2.2=7

13（2x_5）_4（3y+4）=5

I4（x+y）—5（x-y）=2

Z+3y=52x+5y=15

2x-4y=-23x+8y=-1

2

=3

3x+2y2x+yx-y+lx+yx-y

-4--5--6~-^—+^—=10

x+yx-y

x-5y=0f5x+2y=-11

3%+2y=17x-3y=S

"=13

2x-3y=—11

4v32

5%-4y=-3-=-3

143

3x+y=2a+by=2x-3

x-3y=2b-a2x+3y=-l

2x-y=62x+3y=-1

4x+3y=24x-9y=13

汨=22x+5y=19

2x-5y=-11

5x+6y=-192x+3y=16

5x-7y=74x-12y=-4

4x—3y=85x+2j=12

6x+5y=123x+2y=6

'2x+5y=253x+5y=41

4x+3y=159x—1Oy=-52

2x-3y=8x+y=70

<

7x-5y=-530%x+60%y=10%x70

2(x—y)x+yllx+3y=9

-----------=----------1

<34<2x+2y+z=8

.3(x+>)=4(2x-y)+162x-y+4z=5

2x+3y-z=3x+y+z=111

3x-2y+z=4?y:x=3:2

x+2y+z=10y:z=5:4

J3(x-1)=y+53x-y=-7

、5(y_l)=3(x+5)<y+4z=3

2x—2z=—5

2%+4y+3z=9

^_2

<3x-2y+5z=115一3

5x+6y+8z=025%?x+15%-y=L25

x:y=312—x+3y=-6,

<y:z=5:4

1c

x+y+z=66—x+y=2.

12'

2x-3y=0,4x+3y=6

6x+3y=&2x+y=4

2x+y=33。—5b=—2

<

4x—3y=52a+Jb=9

x-y=l5x-2y=7

2x+y=53x+4y=-1

x—1p2x+1

0.1x+0.50.3x-2=i-----------1=-----------

0.030.246

2x-3y=12-x1

3x+y=7x-33-x

-4(x-y-l)=3(l-y)-2m—2n=3

xy

-+-=23m+2rL=5

123

'2x-3y=154x-3y=10

.x=l-5y[3(y+5)=5x-5

-=2J3x-4y=10

23

5x+6y=42

4(x-y-l)=3(l-y)-2

x=l-y3x-2y=7

3x+y=12x+4y=10

2x+3y=22(3a-2h=5

y=3x13a+2。=4

x+y=3,3x+4y=10,

<

2x—3y=-16;4x+y-9=0;

2kx-y)+i=x+y

2x-y=-4/-3-1~

4x—5y=—23(x+y)-2(2x-y)8

5+3y=25

2(x-川4=x+yfx

~3~~4~(2x+7廠3z=19

3(x+y)-2(2x-y)=8(3x+2y-z=18

，x+yx-y

3(x-l)=y+5,--------1--------=o,

-23

5(y-l)=3(x+5);

4(x+y)-5(x-y)=2.

3x-2y=82a-75=8

2x—y=53。一88-10=0

m+nn-m&+3尸25

T~I2x+7廠3z=19

(3x+2y-=18

4"[+'=14z

3

3x-y=72x-7y=3

5x+2y=84x+2y=-2

x+1y-1

3y-4x=6------+-——=

32

3x-4y+l=02x-i1-y

--------十——-

32

3(2元-y)+4(x-2y)=43x+y=360

2(3x.y)-3(x_y)=0112%x+110%y=400

x+2y=0x+1_y-3

3x+4y—6=03x+4y=32

x+yx—y

2x+3y=8--------1--------=o

23

3x+2y=7

.4(x+y)-5(x—y)=2

,2不+>=5kJ3s—5。=6

3k

[5+4r=-15

3x=y+72x+3y=1

<

5x+2y=85x-6y=7

3x~y=7x+1y=600

5y-x=75%x+8%>=600X6%

mn

—+—=13x+y

23

mn26一三

4(x+y)-5(x-y)=2

34

+y=13

'2(x+y)_3y=7

4(x-9)=3(y-2)

mn

5x+2y=1\a

T-4（〃為已知數(shù)）

4x-4y=6a

?-r13

x+y3x+4y

2-5~x(y+l)+y(1)=2

x+y.x(x+l)-y-x2=0

------=1

2

3x+3y3x+2yx+2y-1

----------=-----------=4-2o------+-——

2532

3(2x+3y)_2(3x+2y)25x+2\-y

+------+——-

~"3~632

x+y-z=13x+y=16

<y+z-x=-ly+z=12

z+x-y=3z+x=10

3R+y-4z=13x:y=4:7

<5x—y+3z=5<x:z=3:5

x+y-z=3x-2y+3z=30

3x-4y=103x-2y=6

5x+6y=422x+3y=17

3（x+y）-4（x-y）=45x+4y+z=0

3x+y-4z=11

x+y?冗一?

26x+y+z=-2

y=l—x3（D=y+5

2x+3y=55（y—1）=3（元+5）

2x+y=5矍嚀2

4x-3y=15

x+y=115x-2y=7

V

3x+y=273x+4j=-1

Jx-3y=-20J3x-2y=l

(3x+7y=10014x-5y=3

x=y—12m+7n=5

K

、2y--3x=l3m+n--2

35

—x+—y-—

2x+y=1634-12

x-4y=-1251

—x——y=一

36-3

10-3(y-2)=2(x+l)

J2尤一y=5

5(y-3)4x+9..

----------=------------15匕元+2y=4

I22

x+3y_3

2x-y=5

<2~5

7元—3y=20

5（x-2y）=-4

y=1-x3x-2y=6

2x-y=-4-2x+3y=17

3（x+y）-4（x-y）=45x+4y+z=0

3x+y-4z=11

工+）?XI'=]

26x+y+z=-2

xy

3x=5y-+-=2

23

2x—3y=1

2x+3y=28

x+y

343x+2y2x+yx-y+l

一

山+0=11~4~-5—6~

34

3x—；y=l,

2x+5y=25,

4x+3y=15.

2x+y=2;

y-x=-S2s+3,=—1

x+3y+4=04s-91=8

x-5y=62x+3y=-1

2x-3y=44x-9y=8

2元+y=3

x-3y=2x+y-l5=l

4x-3y=5

4x+6y=6fy=x-2

9x-6y=33L2x+y=7

r3JVH-5y=l1

I3x—2y=4

10-3(y-2)=2(x+l)

"2x-3y=105(y—3)4x+9

--4x+y=-522

2m+3/7=13x+2y=7

7加+6〃=-16x-2y=-\

4(x-y)=3(l-y)+2x-y=-5

日+2=23x+2y=10

123

2x-y=5x+3=2y

x+2y=—1x-y=-l

4元-3y=5

2x+3y=12x-y=2

3x+4y=17

3尤―13x=—163/-4,=14

x+3y=25/+4/=2

3x-5y=92x+2y=8

2%+3y=-62x-2y=4

'2X+3Y=0

y=21,3X-Y=U

7x—3y=1;

xy

3x+2y=-10-+-=2

23

2x-3y=2

0.2x+0.3y=2.8

x-5y=0每-4s=14,

V

‘3x+2y=175t+4s=2;

2x+2y=83x-2y=6

<

2x-2y=4<2x+3y=17

213y-2

x+y=2x—y=654

3x+l3y+2

153x+47y=112

i47x+53y=88x+2y=4,

2x-y=28.

9

3X

4Xy

(++

x42

+工1

y1n

)5

l。8

5

(

x

—

y

)

H

2

43

xX

1+

277

(T

x7

l59

2

)

+

(

y

l

l

)

H

5

3x=4j,4x—2y=4,

x-2y=-5;2x+y=2;

3m+2n=16,2x+3y=4,

3m一〃=1;4x-4y=3;

x+3y+5r

------+--=7,

5x-2y=3,23

x+6y=11;x-42y-3

-------1---------=2.

I35

mn

---------=2

52

3X+2J=10.2m+3/7=4

3(x+y)-4(x-y)=4

w+v=10

x+yx-y

3w-2v=51

26

2s+13s—2/3x-x2I

---------=------------=3---------+------

x2-l1-x

xy

3x+2y=5-+-=2

34

2x-y=8

3x-4y=-7

5x+2y=82x+3y=8

3x—y=73x-27=-l

2-x2x+32x二21.4-3x

一+2-=----------

2~30.330.2

y=-2x+8

2x-y=3x+2y=7

3x+4y=7

x:y=5:33x+2y+z=13

<x:z=7:3<x+y+2z=7

2x-y-z=342x+3y—z=12

3x-2y=6

x-y=-5

2x+3y=17

3x+2y=10

3x—gy=l,

2x+5y=25,

4元+3y=15.

2x+y=2;

x-5y=03x-2y=6

3x+2y=172x+3y=17

x+2=4

“2=12(y—3)=6

32

3x+2y=-4

4x+3y=6,m—n=2

4x-3y=2.2m+3n=14

X

x-5y=02

3x+2y=17x

7*

x+j=11

=3

343x+y=27

3冗+2y=47x+y=300

3x-2y=1930%x+60%y=50%x300

xy+i?Ax+3y—3

<233x-2y=15

3x+2y=10

x—y=l4x+7y=2

2x+y=86x-3y+24=0

x-2y=0f2x-3y=10

3x+2y=SI-4x+y=-5

3x=y+72x+3y=1

5x+2y=85x-6y=7

mnc

—+—=13x+x

y.6~y

232~~3

mn-

——=34(x+y)—5(x—y)=2

34

9

+

"

u

8

1

r

l

j

9

u

1

S

I

+

7

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