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30w=-20w+15
We move all terms to the left:
30w-(-20w+15)=0
We get rid of parentheses
30w+20w-15=0
We add all the numbers together, and all the variables
50w-15=0
We move all terms containing w to the left, all other terms to the right
50w=15
w=15/50
w=3/10
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