A.在等式ab=ac两边除以a,可得b=c | ||||
B.在等式
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C.在等式a=b两边都除以(c2+1),可得
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D.在等式2x=2a-b两边除以2,可得x=a-b |
b |
a |
c |
a |
a |
c2+1 |
b |
c2+1 |
b |
2 |
A.am-3=an-3 | B.5+am=an+5 | C.m=n | D.-2am=-2an |
A.-1 | B.0 | C.1 | D.2 |
A.若
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B.若2x-6=4y-2,则x-3=2y-1 | ||||
C.若x2-5=y2+1,则x2-y2=6 | ||||
D.若
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A.由
| B.由3x=-12,得x=-4 | ||||||
C.由2x=3,得x=
| D.由
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