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130-7w=50+w
We move all terms to the left:
130-7w-(50+w)=0
We add all the numbers together, and all the variables
-7w-(w+50)+130=0
We get rid of parentheses
-7w-w-50+130=0
We add all the numbers together, and all the variables
-8w+80=0
We move all terms containing w to the left, all other terms to the right
-8w=-80
w=-80/-8
w=+10
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