31=7w+3(w+7)

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Solution for 31=7w+3(w+7) equation: 



31=7w+3(w+7)

We move all terms to the left:

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



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

7w+3(w+7)

We multiply parentheses

7w+3w+21

We add all the numbers together, and all the variables

10w+21

Back to the equation:

-(10w+21)



We get rid of parentheses

-10w-21+31=0

We add all the numbers together, and all the variables

-10w+10=0

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

-10w=-10

w=-10/-10

w=1

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