maths x1

2006-11-06 12:36 am
1+7x/4=x+10 求x
更新1:

點解個1都要x4?

回答 (3)

2006-11-06 12:47 am
✔ 最佳答案
1 + 7x/4 = x + 10
(1 + 7x/4)4 = 4(x + 10) <通分母
4 + 7x = 4x + 40
7x - 4x = 40 - 4
3x = 36
x = 12
所以原方程的解是12.
參考: me
2006-11-06 4:48 am
1+7x/4=x+10

4 + 7x = 4x + 40
3x = 36
x = 12
2006-11-06 12:40 am
1+7x/4=x+10
4+7x=4(x+10)
4+7x=4x+40
3x=36
x=12
參考: myself


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