10-5x=1-x+1+2x
5(m-1)=3m-7
更新1:
明明是5(m-1) 點解是5m-5
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回答 (2)
2007-10-17 7:19 pm
✔ 最佳答案
9k-6k= - 31+13k= - 30
k= - 10
10-1-1=-x+2x+5x
8=6x
x=4/3
5m-5=3m-7
5m-3m= - 7 + 5
2m= - 2
m= - 1
2007-10-17 7:24 pm
9k - 1 = 6k - 31
9k - 6k = -31+1
3k = -30
k= -10
10 - 5x = 1 - x + 1 + 2x
10 - 5x = 2 + x
- x - 5x = 2 - 10
- 6x = -8
x = 8/6
x = 4/3
5(m-1) = 3m - 7
5m - 5 = 3m -7
5m-3m = -7 + 5
2m = -2
m = -1
9k - 6k = -31+1
3k = -30
k= -10
10 - 5x = 1 - x + 1 + 2x
10 - 5x = 2 + x
- x - 5x = 2 - 10
- 6x = -8
x = 8/6
x = 4/3
5(m-1) = 3m - 7
5m - 5 = 3m -7
5m-3m = -7 + 5
2m = -2
m = -1
參考: ME
收錄日期: 2021-04-23 19:28:57
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