x-x×0.25=300

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x-x×0.25=300
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x-x×0.25=300
x-x×0.25=300

x-x×0.25=300
x-x×0.25=300
0.75x=300
x=400

400

x-x×0.25=300 （X+X)+(X-X)+(X*X)+(X/X)=100 （x-4)-(x+4)=0.25x 66=X+0.25X求X 0.25x+3.6=x解x x-0.25x+1=10.4x+0.25x-1 x-0.25=0.25x {x+10}x{x+10}=0.25x x-0.25x=0. X-0.25x=0. x-0.25x=48 x-35%x=0.25 x-1.75x=0.25 x-0.25x=15 X-0.25x=0. x-0.25x=2.4 (x-3.6)/x=0.25 x-12=0.25x