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39=8.1+2w
We move all terms to the left:
39-(8.1+2w)=0
We add all the numbers together, and all the variables
-(2w+8.1)+39=0
We get rid of parentheses
-2w-8.1+39=0
We add all the numbers together, and all the variables
-2w+30.9=0
We move all terms containing w to the left, all other terms to the right
-2w=-30.9
w=-30.9/-2
w=15+0.9/2
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