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