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30=12w*3
We move all terms to the left:
30-(12w*3)=0
We add all the numbers together, and all the variables
-(+12w*3)+30=0
We get rid of parentheses
-12w*3+30=0
Wy multiply elements
-36w+30=0
We move all terms containing w to the left, all other terms to the right
-36w=-30
w=-30/-36
w=5/6
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