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80-30w=120-15w
We move all terms to the left:
80-30w-(120-15w)=0
We add all the numbers together, and all the variables
-30w-(-15w+120)+80=0
We get rid of parentheses
-30w+15w-120+80=0
We add all the numbers together, and all the variables
-15w-40=0
We move all terms containing w to the left, all other terms to the right
-15w=40
w=40/-15
w=-2+2/3
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