-(-5x+y)-3(2x-3y)去括号再合并同类项求解
问题描述:
-(-5x+y)-3(2x-3y)去括号再合并同类项求解
如题啦
答
-(-5x+y)-3(2x-3y)
=5x-y-6x+9y
= - x+8y前面好像要加负号