已翻译解方程5

1、1? ?21 ?顐焛 ?m顐m?顐?= 2?顐?顐? ?m顐m?顐?1 ?顐焛 ?m顐m?顐? +1?顐?顐? ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +1?顐?顐? ?m顐m?顐?3? ?顐顐? ? 2?顐? ?顐? ?焛? ? ?吠?吠? ?焛顐? ?1 ?顐焛 ?m顐m?顐? +2?顐?顐? ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +2?顐?顐? ?m顐m?顐?4? ?顐顐? ? 1?顐? ? ?焛 ?焛? ? ?吠?吠? ?焛顐? ?1 ?顐焛 ?m顐m?顐? +1?顐焛 ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +1?顐焛 ?m顐m?顐?5? ?顐? ?顐吠?顐

2、? ?顐吠? ?顐? ? ? ?顐? ? ?顐顐吠? ?顐? ?顐?顐?顐? ?顐?顐? ?顐顐? ?顐? ?顐?顐?顐? ?顐?顐? ?顐? ? ? ?顐吠? ? 6顐? ?m? ?顐顐? ?顐? ?顐? ?吠?吠? ?焛?焛顐? . ?顐顐吠? ? ?顐? ?顐顐吠? ? ?顐? ?顐吠? ?顐6m? 6?顐顐吠? ?顐? 6顐?顐? ?顐? ?顐? ? ?顐? ? ?m? ? ?顐吠? ? 6顐? ?顐m? . 1 ?顐焛 ?m顐m?顐?= 2?顐?顐? ?m顐m?顐?1 ?顐焛 ?m顐m?顐? +1?顐?顐? ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +1?顐?顐? ?m顐m?顐

3、?1 ?顐焛 ?m顐m?顐? +2?顐?顐? ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +2?顐?顐? ?m顐m?顐?1 ?顐焛 ?m顐m?顐? +1?顐焛 ?m顐m?顐?= 2?顐?顐? ?m顐m?顐? +1?顐焛 ?m顐m?顐?7?顐顐? ?顐? ?顐?顐? ?顐m吠?m ?m?顐? ? ? 焛 ?吠? ? ? ?顐? ? ?顐? ?m顐m?顐? ( 3) ? ?顐顐m吠?m ?m顐m?顐? ?顐? ? .8?顐顐吠? ?顐? 6顐?顐? ?顐? ?顐? ? ?顐? ? ?m? ( ?焛 ?m? ) ? ?顐吠? ?焛? . 9? ?顐? ?顐?焛顐? ?顐? ?顐顐顐?顐? 2 顐

4、6顐?顐? ?顐?焛? ? ? ?顐? ?m? ?顐? 顐顐? ?顐顐顐?顐? 2 顐6顐?顐?顐? ?焛? ? ? 焛 ?吠?吠? ? ?10? ?顐顐? ?顐? ?顐?顐?顐? ?顐顐? ?顐? ?顐?焛?- ?顐?焛? ?顐顐顐?顐? 3 ?顐?顐? 4 ?顐? ? 5 ?顐? .顐? ?焛? ? ? 焛 ?吠?吠? ? ?11?顐? ? ?顐m?顐m ?m顐m?顐? ? ? ?顐m? ?顐m顐m?顐? ? ? ? ?顐? ?顐? ? ? ?顐? ?m? ?m? ?顐m? ? 12?顐顐吠? ?顐? 6顐?顐? ?顐? ?顐? ? ?顐? ? ?焛? ( ?焛 0?顐? ?m? ? ?6

5、m? ) ? ?顐吠? ?焛? . 13(1)?顐顐吠? ?顐? 6顐?顐? ?顐? ?顐? ? ?顐? ? ?m? ?焛 ?m? ? ?顐吠? ?顐焛 ? 6顐? ?顐m? . (2)?顐顐吠? ?顐? 6顐?顐? ?顐? ?顐? ? ?顐? ? ?焛? ?焛 ( 0 ? ? ?顐m? ? ) ?6m? ?顐吠? ?顐焛 ? 6顐? ?顐m? . ?顐顐吠? ?顐焛? 144- ?. ? ?顐顐吠?顐吠? ?顐?焛 15 100g100g100g50g100g100g50g? ?顐?顐? ?m顐m?顐? 100?顐? ?顐?. x ?顐? ?m顐m?顐?吠?16 100g100+x25010

6、0g100g50gx=？100+x? ?顐?顐? ?m顐m?顐? 100?顐? ?顐?. x ?顐? ?m顐m?顐?吠?17x=150 100g100g100+x250x=？100+150=250,?1?x=150。100+x=100+150?吠? ?顐? ?顐?顐?顐? ?顐? x=150 ?顐? 100? ?m? ? ?顐 ?顐m顐 .18100+x250 x150100+x=250?顐顐吠? ? ? ?顐?顐? ? ?顐?顐顐? ?m? ?顐? ?顐顐? ?顐顐顐吠? ?顐?焛 ? ?顐顐? .? 顐吠? ?顐 ?顐?焛 ?顐m? . x=150 6顐顐?顐?焛 ? ? ?顐顐顐吠? ?

7、顐顐?焛 ?顐? ?焛? ?顐顐吠? ?顐?焛 ?顐顐焛? .19x = 6 ，= 5 += 611= ?顐? 5 + x = 11 顐吠? ?m? ? 6 ? ?吠? ?顐?顐顐吠? ?m? ? 6 (?顐m? ?焛?m?) ? ?顐? x = 6 顐? ? ? ?顐6顐? ?顐m?. ?m? ? ?顐顐顐吠? ? ?顐? ?顐顐顐吠? ? ?顐? 20 x=3 =5x =53 =15 = ?x=3 ?顐 ?顐顐?焛 5 x =15 顐吠? x=3x=3 ?顐 ?顐顐顐吠? ?顐?焛 ?焛 6顐顐? ? ? ?顐顐顐? ?顐?顐顐吠? ?顐? ?焛? ?顐? ?顐? ? ?焛 6顐顐? 顐焛

8、?. :?顐焛 ?顐?顐?顐顐顐吠? ? ?顐?顐顐顐吠? ? ?顐?吠? ?m? ?顐顐顐吠? ?顐?焛 ? ? ?顐? ?顐 ?顐?焛 ?焛 ?顐顐? 顐顐?. 5 x =15 顐吠? x=2213x=12 (x=4 x=6 )3.5- x=2.1 (x=3.8 x=1.4 )0.7(x-2)=5.6 (x=8 x=10 )(x+0.4)2.5=1 (x=2 x=2.1 )?顐?焛 ?顐? ?顐? ?顐?顐顐? ?顐?焛? ?顐顐顐吠?22? !23x? 9?籸x+3=924xx + 3 = 9 x=- 3- 36x+3=9:顐吠?顐顐顐吠? ?顐? ?顐?顐?顐? ?顐? ?顐? ? ?

9、 ?m? ? ?顐? ?顐? ?顐焛 ? ?顐m? . 25 =x+3 =6+3 =9 =x=6 x+3=9x+3-3=9-3 x=6x=6 ? 顐? ? ? ?焛?.:?顐顐吠? ?顐?焛: ?顐?焛?顐顐顐吠? ? ?顐? ?顐顐顐吠? ? ?顐? ?吠? ?m? ?顐顐顐吠? ?顐?焛 :?263x=18xxx3x（ ）=18（ ）:?顐顐吠? ?顐?焛?顐顐顐吠? ?顐? ?顐?顐? ?顐? ?顐? 0? ? ?顐m? ? ? ?m? ? ? ?顐? ?顐? ?顐焛 ? ?顐m? . 273x=18方程两边同时除以同一个不等于0的数，左右两边仍然相等。xxx3x（ ）=18（ ）33:

10、?顐顐吠? ?顐?焛?顐顐顐吠? ?顐? ?顐?顐? ?顐? ?顐? 0? ? ?顐m? ? ? ?m? ? ? ?顐? ?顐? ?顐焛 ? ?顐m? . 283x=183x（ ）=18（ ）33x=6 =3x =36 =18 = x=6? ?焛?!:?顐顐吠? ?顐?焛: ?顐?焛?顐顐顐吠? ? ?顐? ?顐顐顐吠? ? ?顐? ?吠? ?m? ?顐顐顐吠? ?顐?焛 :?29 (1) x 5 = 7 ; (2) 4x = 4 ； x 5 +57+5 x124x 4 4 4x1?顐? ?顐顐吠? ?顐?焛 .: ?顐?焛: ?顐?焛30 x + 3.2 = 4.6 x x + 3.2 =

11、4.6 x 1.8 = 4 x 1.8 = 4 x 2 = 15 2 = 15 1.6 x = 6.4 x 1.6 x = 6.4 x 7 = 0.3 x 7 = 0.3 x 3 = 2.1 3 = 2.1 xxx8.4x1.241.顐吠? ? ?.2.?顐顐吠? ?顐?焛.?顐顐? ?顐?顐?顐?焛?焛?焛?焛?焛?焛?焛31 4x = 3x+4 ；4x -3x 3x+4 -3xx4 =4x =44 =16 x=4 =3x+4 =34+4 =124 =16 ? 顐? ? ? ?焛?.:?顐? ?顐顐吠? ?顐?焛: ?顐?焛?顐顐顐吠? ? ?顐? ?顐顐顐吠? ? ?顐? ?吠? ?m?

12、?顐顐顐吠? ?顐?焛 :?顐顐顐吠? ? ?顐? = ?顐顐顐吠? ? ?顐?32 33x=65 33 + x - ( ) = 65 - ( ) x - 4.5 = 10 x - 4.5 ( ) = 10( ) 6x = 72 6x ( ) = 72 ( ) x 30 = 1.5 x 30 ( ) = 1.5 ( ) 3333+ 4.5+ 4.5 6 6x 30 x 30?顐? 6顐顐? ?顐? ? ?m? ? ?顐? 6顐顐? ?顐? ?r? ?顐?顐6m? ?m? . 3334x0.52.536?顐?顐? ?顐? ?m顐 6顐?顐? ? 顐吠? ? ?顐顐吠? ?顐?焛. ?顐?顐?顐?

13、顐?顐?顐?352.8km152cmy cma颗?ri籸? ?i?灄 ?籸灄i ?ii?i灄? ?i籸ii1? ?i?ii籸? ?i籸?i .iirri 28? ii?i灄i?.?r?.5cm? ?i籸?灄 ?x ? ?灄i籸?籸 40 ? ?i1 ?籸i? 2.8km? ?r籸?r?r.?i籸? ? ?rr ?i? ?籸i?r?r.s25 ?iir ?灄灄籸 ?r?1 ?籸?1 ? ? ?i?i1 3? ?ii ? ?籸 ?籸?r.3637?籸?吠? ?灄 ?14.14-0.64=13.5（m）? ?6顐? ? 8? ?m? ?顐顐?顐? ? ? 14.14?顐? ?顐?焛 ? ? ? ?顐

14、?顐? 0.64?顐? ?顐? ? . ? ? ?14.14?顐?籸?吠? ?灄 ? ? ?i? ? 38xx+0.64=14.14x+0.64-0.64=14.14-0.64 x=13.5? ?6顐? ? 8? ?m? ?顐顐?顐? ? ? 14.14?顐? ?顐?焛 ? ? ? ?顐?顐? 0.64?顐? ?顐? ? . ? ? ? ? ?顐? ? ? ? ?14.14?顐?籸?吠? ?灄 ?r?r?r1 ?灄 ?=?灄? ?灄i +?籸?吠? ?灄 ?籸?吠? ?灄 ?i? ?籸 ? iii .?籸?吠?1? ?灄 ? 13.5 ?i? ?籸i?1 .39?601020304050607

15、08090100110120130? ?i?i? ?1 ?i?i? 1.17?i? ? ? ?i籸i?1 6?i?i?灄 ?r灄 ?灄?1 ?i? ?1 ?1 ?i?i? ?ii? ? 40i灄 ?i1 ?灄 ?i? ?i籸i? ?ir?r? ?i?i ?ii? ?灄 ?灄i ?i灄i?i籸i?1 i灄?i1 ?i? ?i1 ?r?i ?i? ?灄 ? ? ? 1.8?i?ir ?灄 ?籸? .41 ? ?i ? ?灄x?i? ?灄 ? ?灄= 30 1.8kg=1800g 30 x=1800 30 x30=180030 x=60 i灄 ?i1 ?灄 ?i? ?i籸i? ?ir?r? ?i?i

16、 ?ii? ?灄 ?灄i ?i灄i?i籸i?1 i灄?i1 ?1? :?灄 ?i? ?i籸i? ?ir?r? ?i?i 60?i? ?灄 ?灄i ?籸i?1.?灄 ?i? ?i籸i? ?ir?r? ?i?i ?灄i ?1 ?灄 ?籸 ? iii . x42?i1 ?i ?r ?r ? ?籸i? ?i? ? 003 ?1 ?籸?r .?rr? ?籸?籸 ? ?灄? ?i1 ? ?i1 ?r?灄 ?i? ? ?1 ?籸i? ?43x元/枝x?i?1 ?ri籸?吠?灄i ?i?灄 ?籸灄i ?ii?i灄? ?灄?灄? ? ?i1? ?rr ?籸? ?i?ii1? ?ii? i? .?灄? ?灄?1:

17、 ?r ?i? ?i?1 : 45?r ?i? ?灄?1: 128?r? ?i1 ?r?灄i 75 ?i? ?i1 ?灄ir?r 18 ?r44a + 2 = 12 b + 3 = 12c + 4 = 12 d + 5 = 12a - 2 = 12 b - 3 = 12c - 4 = 12 d - 5 = 12a 2 = 12 b 3 = 12c 4 = 12 d 5 = 12 2a = 12 3b = 12 4c = 12 5d = 12?i灄?i1?灄? ?籸? ?i?1 ? ?i1 ? ?ri籸?ii1? ? ? ?i?灄 ?i ?i籸?i籸?i ?i?灄 ?i ? .45?吠?籸?灄 ? ?i灄 ?吠?1 ?r? ?r?i? ?i?iri灄?籸 ?ii灄?1 ?i灄i ?i? ?i灄?i1 ? ?r ? ?i?i灄?r ?iir i1 ?r ?i灄?籸 ?i灄? ?籸i?1 .?i1 ? ? ?i? ?rri ?ir? i?- ?i?16?1 ?i灄?籸 ?籸ii灄?1 .?i籸i? ? ?i? ?i籸?i? ?i?r ? ? ?i1 ?i?1 ?r