x-0.25x=7.5

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x-0.25x=7.5x-0.25x=7.5x-0.25x=7.5x-0.25x=7.5(1-0.25)x=7.50.75x=7.5x=7.5÷0.75=100.75x=7.5,x=10X-0.25X

x-0.25x=7.5
x-0.25x=7.5

x-0.25x=7.5
x-0.25x=7.5
(1-0.25)x=7.5
0.75x=7.5
x=7.5÷0.75=10

0.75x=7.5,
x=10

X-0.25X=7.5
0.75X=7.5
X=10

0.75x=7.5
x=7.5/0.75
x=10

x-0.5x=7.5

0.5x=7.5

5x=75

x=15

x-0.25x=7.5 （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 当X=7.5/35,4 X+6X-0.25X 等于多少 x-0.25x+1=10.4x+0.25x-1 x-0.25=0.25x (x-(x/7.5+x/5))/(x/5)=10/3 {x+10}x{x+10}=0.25x x-7.5x=18.7 X+1.5%X=7.5 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