问题标题:
化简x-[y-2x-(-x-y)]的结果是()A.2xB.-2xC.3x-2yD.2x-2y
问题描述:
化简x-[y-2x-(-x-y)]的结果是()
A.2x
B.-2x
C.3x-2y
D.2x-2y
朴松昊回答:
x-[y-2x-(-x-y)]
=x-[y-2x-(-x-y)]
=x-[y-2x+x+y]
=x-y+2x-x-y
=2x-2y.
故选D.
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化简x-[y-2x-(-x-y)]的结果是()
A.2x
B.-2x
C.3x-2y
D.2x-2y