-3=7+w

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Solution for -3=7+w equation: 



-3=7+w

We move all terms to the left:

-3-(7+w)=0

We add all the numbers together, and all the variables

-(w+7)-3=0

We get rid of parentheses

-w-7-3=0

We add all the numbers together, and all the variables

-1w-10=0

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

-w=10

w=10/-1

w=-10

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