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-13=w+-18
We move all terms to the left:
-13-(w+-18)=0
We add all the numbers together, and all the variables
-(w-18)-13=0
We get rid of parentheses
-w+18-13=0
We add all the numbers together, and all the variables
-1w+5=0
We move all terms containing w to the left, all other terms to the right
-w=-5
w=-5/-1
w=+5
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