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方程數學的問題(thx)

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1.8=18-5c 2.59-3d=2 3.5=9+6-2x 4.4+3n-12=22 請寫過程

最佳解答:

1.8=18-5c 5c = 18-8 5c = 10 c = 2 2.59-3d=2 3d = 59-2 3d = 57 d = 19 3.5=9+6-2x 2x = 9 + 6 - 5 2x = 10 x = 5 4.4+3n-12=22 3n = 22 - 4 + 12 3n = 30 n = 10

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我e家就係做緊e幾題-3- 新紀元數學 習題2B(p.91) 2008-10-07 15:09:10 補充： 不過有d野提你: 本書第6題即你e道既第4題係 4+3n-12=25 但你寫左4+3n-12=22 不過都唔知你係唔係e本書-3- 提下你啫,冇野la 如果你係用e本既話,e題應該係: 4+3n-12=25 3n=25+12-4 3n=33 n=11 睇你係5係用e本la下~|||||1. 8=18-5c 18-8=5c c=5/10 c=2|||||1. 8=18-5c 8-18=18-5c-18 -10=-5c -10/5=-5c/5 -2=-c c=2 2.59-3d=2 59-2=3d 57=3d 57/3=d 19=d 3.5=9+6-2x 2x=9+6-5 2x=10 x=5 4.4+3n-12=22 3n=22+12-4 3n=30 n=10|||||(1)8=18-5c 5c=18-8 5c=10 c=2 (2)59-3d=2 59-2=3d 57=3d d=19 (3)5=9+6-2x 2x=9+6-5 2x=10 x=5 (4)4+3n-12=22 3n=22-4+12 3n=30 n=10|||||1. 1.8=18-5c 解:5c=18-1.8 5c=16.2 c=16.2÷5 c=3.24 2. 59-3d=2 解:3d=59-2 3d=57 d=57÷3 d=19 3. 5=9+6-2x 解:2x=9+6-5 2x=10 x=10÷2 x=5 4. 4+3n-12=22 解:3n=22+12-4 3n=30 n=30÷3 n=10|||||1. 8=18-5c 5c=18-8 c = 10/2 c=5 2. 59-3d=2 59-2 =3d 57 =3d d= 19 3. 5=9+6-2x 5=15-2x 2x=15-5 2x=10 x=2 4. 4+3n-12=22 3n-8=22 3n=22+8 3n=30 n=10|||||8=18-5c 8-18=-5c -10=-5c -10 x -1=-1 x -5c 10 = 5c 10/5 = c c = 2 2008-10-04 09:09:42 補充： 59-3d=2 -3d = 2 - 59 -3d = - 57 d = -57 / -3 d = 19 2008-10-04 09:11:26 補充： 5=9+6-2x 5-9-6 = -2x -10 = -2x x = -10/-2 x = 5 2008-10-04 09:15:39 補充： 4+3n-12=22 3n = 22 +12 -4 3n = 30 n= 10