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(w+40)+(w+40)+w+w=(w+45)+(w+45)+(w+45)
We move all terms to the left:
(w+40)+(w+40)+w+w-((w+45)+(w+45)+(w+45))=0
We add all the numbers together, and all the variables
2w+(w+40)+(w+40)-((w+45)+(w+45)+(w+45))=0
We get rid of parentheses
2w+w+w-((w+45)+(w+45)+(w+45))+40+40=0
We calculate terms in parentheses: -((w+45)+(w+45)+(w+45)), so:We add all the numbers together, and all the variables
(w+45)+(w+45)+(w+45)
We get rid of parentheses
w+w+w+45+45+45
We add all the numbers together, and all the variables
3w+135
Back to the equation:
-(3w+135)
4w-(3w+135)+80=0
We get rid of parentheses
4w-3w-135+80=0
We add all the numbers together, and all the variables
w-55=0
We move all terms containing w to the left, all other terms to the right
w=55
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