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305=90+(20+6)w
We move all terms to the left:
305-(90+(20+6)w)=0
We add all the numbers together, and all the variables
-(90+26w)+305=0
We get rid of parentheses
-26w-90+305=0
We add all the numbers together, and all the variables
-26w+215=0
We move all terms containing w to the left, all other terms to the right
-26w=-215
w=-215/-26
w=8+7/26
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