1) (2-x)/3 - (x +1)/5 = 1/3
2) 0.4-0.6(x-3)=(1/3)x - 3/5(x-7)
maths(about 方程式)
2008-04-25 4:43 am
回答 (2)
2008-04-25 6:07 am
✔ 最佳答案
1) (2-x)/3 - (x +1)/5 = 1/35(2-x)-3(x+1)=5
10-5x-3x-3=5
-8x=-2
x=1/4
2) 0.4-0.6(x-3)=(1/3)x - 3/5(x-7)
2/5-3/5(x-3)=(1/3)x - 3/5(x-7)
6-9(x-3)=5x-9(x-7)
6-9x+27=5x-9x+63
5x=-30
x=-6
2008-04-25 5:57 am
1) x = 1/4
2) x = -6
2) x = -6
收錄日期: 2021-04-23 20:32:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080424000051KK02456