化简:(4x-3y)-[-(2x+y)+(x-y)]-5x
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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