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7f+8=3f+34
We move all terms to the left:
7f+8-(3f+34)=0
We get rid of parentheses
7f-3f-34+8=0
We add all the numbers together, and all the variables
4f-26=0
We move all terms containing f to the left, all other terms to the right
4f=26
f=26/4
f=6+1/2
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