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-1.6f+15.68=-18.8f-18.72
We move all terms to the left:
-1.6f+15.68-(-18.8f-18.72)=0
We get rid of parentheses
-1.6f+18.8f+18.72+15.68=0
We add all the numbers together, and all the variables
17.2f+34.4=0
We move all terms containing f to the left, all other terms to the right
17.2f=-34.4
f=-34.4/17.2
f=-2
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