15 |
4 |
7 |
2 |
2x |
3 |
x |
3 |
7 |
4 |
7 |
2 |
x |
3 |
A.将2-
| ||||||||
B.由
| ||||||||
C.40-5(3x-7)=2(8x+2)去括号,得40-15x-7=16x+4 | ||||||||
D.-
|
x |
2 |
x-2 |
6 |
x-1 |
3 |
A.3x-(x-2)=6-2(x-1) | B.3x-x-2=6-2(x-1) |
C.3x-(x+2)=1-2(x-1) | D.3x-x+2=3-2(x-1) |
5x+7 |
2 |
x+17 |
4 |
A.3-2(5x+7)=-(x+17) | B.12-2(5x+7)=-x+17 |
C.12-2(5x+7)=-(x+17) | D.12-10x+14=-(x+17) |
x-1 |
4 |
2-x |
3 |
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