7=w+15

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Solution for 7=w+15 equation: 



7=w+15

We move all terms to the left:

7-(w+15)=0

We get rid of parentheses

-w-15+7=0

We add all the numbers together, and all the variables

-1w-8=0

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

-w=8

w=8/-1

w=-8

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