0.6x+140 =X

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0.6x+140 =X
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0.6x+140 =X
0.6x+140 =X

0.6x+140 =X
0.6x+140=x
-0.4x=-140
x=350

答案是350

0.6x+140 =X 0.6X+140 =X （X+X)+(X-X)+(X*X)+(X/X)=100 x+(x-140)+(x-210)=270 x=? 0.6x(200-X)-4X=106.2 X=? x+15%x=140 (8.9-x)/x=0.6 x--0.6x=4.8 x-0.6x=14 (10000-x)/x=0.6 x-0.6x=5.6 x-0.6x=2.4 x-0.9=x+0.6 x-0.6x=0.7 x*x*x*x*x=80000? 解方程5x+2x+3x+8x+6x=140-x-3x x*x*x=504 x*x*x=504 （x+x）+(x-x)+(x/x)=11.2