13=7-3w

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Solution for 13=7-3w equation: 



13=7-3w

We move all terms to the left:

13-(7-3w)=0

We add all the numbers together, and all the variables

-(-3w+7)+13=0

We get rid of parentheses

3w-7+13=0

We add all the numbers together, and all the variables

3w+6=0

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

3w=-6

w=-6/3

w=-2

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