已翻譯方程的意義ppt

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2、 ?o? ?-? ? ?o? ?o?o? ?6? . 171.85.2（=）737-17（=）20ab（=）ba?riali? : ?脷i?i?r?r ?r?l? ?ia? ?rial? ?ai ?a?ai脷?i? ?ia? ?i?ir?r ?ill ?脷?i? ?ia? ?脷 ?脷iai?.1819” r8 ?m? “? ?r? ?202030212030? ?r? ?2220305023203050242030502520305020 +30 =50r8 ?8 ? i ?b?r?r8 ?8 ?2620?10020+x=100x?il?r? ?l? ?lr ?i? ?ir? ? 27?r?r

3、小 ? ? 100?100g100g?r? 28100g?r? 29100g100+x? ?8 ? ?r ? ? ?8 ? ? ?8 ?r ? ?m.x?8 ? ?r ? ?小 30100+x100g100+x20050g100g100g?i小 ?l? ? 31100g100g100g100+x100+x30050g100g100g100g?i小 ?l? ? 32100g100g100g50g100+x?i小 ?l? ? 33100g100g100g50g100+x250100+x?i小 ?l? ? ?r? 34 100 x=250m? ?o m? ? ?r?m ? ? ? ? ? m? ro

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5、i ?6?6? ? .l? ?小 ?i小8 ? r? ?6 lo? rmm? ?m?r小r m? ?8m? ?i39?a2?3iri?!?i?-?r?r? ?i潬rl? 40x50x2x = 50x73166x + 73 = 1661.?arir?r ?r? ?ria? ?tlt? .412.?t? ?iai? :4.7 ?ria? ?r? . ( ) x (1)0.5?rll ?ria? ? ?ia? ?脷?i? ?r? .( ).x= 4 (2)?ria? ?rll ?rl? ?ia? . ( ) (3)?ia? ?rll ?rl? ?ria? . ( ) (4)425x=9 ?i 95=

6、x ?i9x=5 40 x=18 ?i 18x=40 ?i4018=x3.?i脷? ?i脷r?aair?r ?ia?r rrr?脷lir ?i?i?ir?r ?ria? ?iai?r? lirr?l?2iai脷?i? ? (1)?lf?2i3 5?脷 ?l? ?ia?i?r ?r? 9?t2 ?脷ia?f ? ?脷? r? ri ?t2 . x ?l?r? x(2) ?l? ?rial?rl? ?脷i?i?脷 40?r? ?i?-? ?l? ?ll ? ?i脷?l?r ?i2? ? ? ?2 18 ?r? ?脷l? . 43 s=4212 ?i s42=12 ?i s12=42ri?rlai?

7、 ? ri ?i3?r ?ai?i?r 42 s(3)? ? ?ai ? ?i?2? ?liair? ri?rlai? ?rtr ?ai ?r?r ? ?i2?12?r ?i?2 ?脷ir? . 44 5.1=x4.75 ?i 5.1x=4.75 ?i5.14.75=x (4)ri ?i?ai? ?lilrii? 5.1?l? ? ri ?2? ?i?il? ?l? ? r? ?i脷ai? 4.75?l? ?i?i2 . x?lilrii?45 80a=45.4 ?i 45.480=a ?i 45.4a=80(5)?i?ir?2i3 ?i?i2? ? ?i脷2? ?l? ?i?ia3i? ?r

8、?脷lir 80 ?lai? ?ll ? ?l? ?l? ?t?t? 45.4?t2 ?t2 .a?脷r?3? ? r? ri ?lai? ?l? ?l? 463?ir 6lt2 ?i脷ai2 ?r? ?i? ?iriaai? r?lilririr ?i脷iria? ?i?iai脷2? ?r?ir?i?iai? ?r?aiair?r ? ?3iai? ?ai .?ri脷? ?脷?a?l? ?irf? 2?ir ?i2 ?riaai? ?iail2 l?l?l? ?ia? ?r? ri ?r? ?i脷iria? ?i?iai脷2? ? ?il?r? ?r?aiair?r ? ?l3iai? ri?脷 ?fir? r?l?2ri?r ?a?lri?f . ?i脷?i? 300r?ai2 ?riaai? ? ?ia2ir?ri吾 ?ilr? ?i脷r?a?r? ?iai脷2? ? ?l?r? ?r z、y、 x?i?r?r ?r?脷 ?iri ?ll ? ?3?ai脷?i? ?3? ?i脷?iai? ?i2? ? ?