A.
| B.-
| C.3 | D.-3 |
3x-7 |
4 |
x+17 |
5 |
x+1 |
3 |
A.去分母,得x+1-6(x-1)=18 | B.去括号,得x+1-6x+6=18 | ||
C.移项,得x-6x=18-1-6 | D.合并同类项,得x=
|
A.从7+x=13,得到x=13+7 | ||
B.从5x=4x+8,得到5x-4x=8 | ||
C.从9x=-4,得到x=-
| ||
D.从
|
x |
2 |
x-1 |
3 |
A.3x-2(x-1)=1 | B.3x-2(x-1)=6 | C.3x-2x-2=6 | D.3x+2x-2=6 |
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