-7=-15+x

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Solution for -7=-15+x equation: 



-7=-15+x

We move all terms to the left:

-7-(-15+x)=0

We add all the numbers together, and all the variables

-(x-15)-7=0

We get rid of parentheses

-x+15-7=0

We add all the numbers together, and all the variables

-1x+8=0

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

-x=-8

x=-8/-1

x=+8

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