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