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-8f+17+12f=1+3f
We move all terms to the left:
-8f+17+12f-(1+3f)=0
We add all the numbers together, and all the variables
-8f+12f-(3f+1)+17=0
We add all the numbers together, and all the variables
4f-(3f+1)+17=0
We get rid of parentheses
4f-3f-1+17=0
We add all the numbers together, and all the variables
f+16=0
We move all terms containing f to the left, all other terms to the right
f=-16
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