x+12.5=3.5x
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x+12.5=3.5x
x+12.5=3.5x
x+12.5=3.5x
12.5=3.5x-x
12.5=2.5x
5=x
移项,相除,得5
12.5=3.5x-x
12.5=2.5x
2.5x=12.5
x=5
2.5x=12.5
x=5
3.5x-x=12.5 2.5x=12.5 x=5
x+12.5=3.5x
x+12.5=3.5x
x+12.5=3.5x
12.5-2.5x=3.5x
(X+X)+(X-X)+(X*X)+(X/X)=100
3.5x-x=7.x=?
x+12.5等于3.5x
X-12.5%X=(56-X)+12.5%X
3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5
12.5%x+1=x
12.5%x+1=x
12.5-0.25X=X
6x-x=12.5
6.5x-4.5x=93.6-6.5x-3.5x
3.5x-x=17.5
4.5X-X=3.5
x+3.5x=9.
3.5x=x-3.65