化简2x-【2(x+4)-3(x+2y)】-2y
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化简2x-【2(x+4)-3(x+2y)】-2y
化简2x-【2(x+4)-3(x+2y)】-2y
化简2x-【2(x+4)-3(x+2y)】-2y
2x-【2(x+4)-3(x+2y)】-2y
=2x-(2x+8-3x-6y)-2y
=2x-(-x-6y+8)-2y
=2x+x+6y-8-2y
=3x+4y-8
=2x-2x-8+3x+6y-2y
=3x+4y-8
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(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
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