化简：(4x-3y)-[-(2x+y)+(x-y)]-5x

化简：(4x-3y)-[-(2x+y)+(x-y)]-5x
化简：(4x-3y)-[-(2x+y)+(x-y)]-5x

化简：(4x-3y)-[-(2x+y)+(x-y)]-5x

把括号拆掉，该变号的变号。

原式子=4X-3y-[-2x-y+x-y]-5x
=4X-3y+x+2y-5x
=-y

(4x-3y)-[-(2x+y)+(x-y)]-5x（先去括号）
=4x-3y-[-2x-y+x+y]-5x（接着去括号）
=4x-3y-(-2x)-(-y)-(x-y)-5x
=4x-3y+2x+y-x+y-5x
=4x+2x-x-5x-3y+y+y
=-y

(4x-3y)-[-2X-y+x-y]一5x
4x-3x+2x+y-x+y-5x
一5x+2y