3-x |
2 |
x+4 |
3 |
2x-1 |
2 |
x+1 |
5 |
3-x |
2 |
x+4 |
3 |
2x-1 |
2 |
x+1 |
5 |
1 |
8 |
A.-1 | B.1 | C.-3 | D.3 |
3 |
2 |
5 |
2 |
A.x=-3 | B.x=-
| C.x=3 | D.x=
|
2x-5 |
6 |
3-x |
4 |
A.由x+3=6,得x=6+3 |
B.由2x=x+1,得x-2x=1 |
C.由-2y=12-y,得y-2y=12 |
D.由x+5=1-2x,得x-2x=1+5 |
1 |
2 |
A.0 | B.2 | C.-2 | D.-6 |
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