15=-7+w

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Solution for 15=-7+w equation: 



15=-7+w

We move all terms to the left:

15-(-7+w)=0

We add all the numbers together, and all the variables

-(w-7)+15=0

We get rid of parentheses

-w+7+15=0

We add all the numbers together, and all the variables

-1w+22=0

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

-w=-22

w=-22/-1

w=+22

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