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279=157-w
We move all terms to the left:
279-(157-w)=0
We add all the numbers together, and all the variables
-(-1w+157)+279=0
We get rid of parentheses
1w-157+279=0
We add all the numbers together, and all the variables
w+122=0
We move all terms containing w to the left, all other terms to the right
w=-122
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