2(x+2.5)=5x
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2(x+2.5)=5x2(x+2.5)=5x2(x+2.5)=5x2(x+2.5)=5x2x+5=5x5=5x-2x=3xx=5/32(x+2.5)=5x2x+5=5x3x=5x=5/32X+5=5X
2(x+2.5)=5x
2(x+2.5)=5x
2(x+2.5)=5x
2(x+2.5)=5x
2x+5=5x
5=5x-2x=3x
x=5/3
2(x+2.5)=5x
2x+5=5x
3x=5
x=5/3
2X+5=5X
5=3X
X=5/3
2X+5=5X
5X-2X=5
3X=5
X=0.6
2(x+2.5)=5x
2x+5=5x
3x=5
x=5/3
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写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4
2(x+2.5)=5x
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2*x*x+2.5x=13 x=?
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
5x/(x-2)-2=3(x-2)/x