化简(x-y)-4(2x-3y)
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化简(x-y)-4(2x-3y)化简(x-y)-4(2x-3y)化简(x-y)-4(2x-3y)(x-y)-4(2x-3y)=(x-y)-(8x-12y)=x-y-8x+12y=11y-7x
化简(x-y)-4(2x-3y)
化简(x-y)-4(2x-3y)
化简(x-y)-4(2x-3y)
(x-y)-4(2x-3y)
=(x-y)-(8x-12y)
=x-y-8x+12y
=11y-7x