-31=3(w-7)-8w

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Solution for -31=3(w-7)-8w equation: 



-31=3(w-7)-8w

We move all terms to the left:

-31-(3(w-7)-8w)=0



We calculate terms in parentheses: -(3(w-7)-8w), so:

3(w-7)-8w

We add all the numbers together, and all the variables

-8w+3(w-7)

We multiply parentheses

-8w+3w-21

We add all the numbers together, and all the variables

-5w-21

Back to the equation:

-(-5w-21)



We get rid of parentheses

5w+21-31=0

We add all the numbers together, and all the variables

5w-10=0

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

5w=10

w=10/5

w=2

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