已知等式ax=ay,下列变形正确的是( )
A. x=y
B. 3-ax=3-ay
C. ay=-ax
D. ax+1=ay-1
人气:206 ℃ 时间:2019-11-01 19:34:26
解答
A、a=0时,x不一定等于y,故 A错误;
B 3-ax=3-ay,故B正确;
Cay=ax,ay≠-ax,故C错误;
Dax+1=ay+1,故D错误;
故选:B.
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