A.由
| B.由2x=-3,得x=-
| ||||
C.由y+2=-3,得y=-5 | D.由
|
3 |
2 |
2 |
3 |
9 |
4 |
A.m=5,n=6 | B.m=1,n=-6 | C.m=1,n=6 | D.m=5,n=-6 |
A.
| B.
| ||||||||
C.
| D.
|
A.若x=y,则x+a=y-a | B.若m=n,则m+z=n+z | ||||
C.若x=y,则
| D.若x=y,则zx=-zy |
y |
4 |
1 |
2 |
3 |
2 |
1 |
3 |
A.由5=x-2得x=-5-2 | B.由5y=0得y=
| ||
C.由3x=-2得x=-
| D.由2x=3x+5得-5=3x-2x |
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