25=3x-x-15

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Solution for 25=3x-x-15 equation: 



25=3x-x-15

We move all terms to the left:

25-(3x-x-15)=0

We add all the numbers together, and all the variables

-(2x-15)+25=0

We get rid of parentheses

-2x+15+25=0

We add all the numbers together, and all the variables

-2x+40=0

We move all terms containing x to the left, all other terms to the right

-2x=-40

x=-40/-2

x=+20

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