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15=8+2w
We move all terms to the left:
15-(8+2w)=0
We add all the numbers together, and all the variables
-(2w+8)+15=0
We get rid of parentheses
-2w-8+15=0
We add all the numbers together, and all the variables
-2w+7=0
We move all terms containing w to the left, all other terms to the right
-2w=-7
w=-7/-2
w=3+1/2
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