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-19.9=w/7-2.4
We move all terms to the left:
-19.9-(w/7-2.4)=0
We get rid of parentheses
-w/7+2.4-19.9=0
We multiply all the terms by the denominator
-w+(2.4)*7-(19.9)*7=0
We add all the numbers together, and all the variables
-1w-122.5=0
We move all terms containing w to the left, all other terms to the right
-w=122.5
w=122.5/-1
w=-122+0.5/1
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