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2w+15.7=4w-12.5
We move all terms to the left:
2w+15.7-(4w-12.5)=0
We get rid of parentheses
2w-4w+12.5+15.7=0
We add all the numbers together, and all the variables
-2w+28.2=0
We move all terms containing w to the left, all other terms to the right
-2w=-28.2
w=-28.2/-2
w=14+0.2/2
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