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16.8=f+8
We move all terms to the left:
16.8-(f+8)=0
We get rid of parentheses
-f-8+16.8=0
We add all the numbers together, and all the variables
-1f+8.8=0
We move all terms containing f to the left, all other terms to the right
-f=-8.8
f=-8.8/-1
f=8+0.8/1
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