(7w-7)+(3w+7)=90

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Solution for (7w-7)+(3w+7)=90 equation: 



(7w-7)+(3w+7)=90

We move all terms to the left:

(7w-7)+(3w+7)-(90)=0

We get rid of parentheses

7w+3w-7+7-90=0

We add all the numbers together, and all the variables

10w-90=0

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

10w=90

w=90/10

w=9

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