15-3x=7-x

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Solution for 15-3x=7-x equation: 



15-3x=7-x

We move all terms to the left:

15-3x-(7-x)=0

We add all the numbers together, and all the variables

-3x-(-1x+7)+15=0

We get rid of parentheses

-3x+1x-7+15=0

We add all the numbers together, and all the variables

-2x+8=0

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

-2x=-8

x=-8/-2

x=+4

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