2(2/3x-2)-3(2x-3/4)=7
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2(2/3x-2)-3(2x-3/4)=7
2(2/3x-2)-3(2x-3/4)=7
2(2/3x-2)-3(2x-3/4)=7
2(2/3x-2)-3(2x-3/4)=7
4/3x-4-6x+9/4=7
6x-4/3x=-4+9/4-7
14/3x=-35/4
x=-35*3/(14*4)=-15/8
15/8
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一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
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