13=7w+8(w-4)

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Solution for 13=7w+8(w-4) equation: 



13=7w+8(w-4)

We move all terms to the left:

13-(7w+8(w-4))=0



We calculate terms in parentheses: -(7w+8(w-4)), so:

7w+8(w-4)

We multiply parentheses

7w+8w-32

We add all the numbers together, and all the variables

15w-32

Back to the equation:

-(15w-32)



We get rid of parentheses

-15w+32+13=0

We add all the numbers together, and all the variables

-15w+45=0

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

-15w=-45

w=-45/-15

w=+3

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