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-2(3-f)=4
We move all terms to the left:
-2(3-f)-(4)=0
We add all the numbers together, and all the variables
-2(-1f+3)-4=0
We multiply parentheses
2f-6-4=0
We add all the numbers together, and all the variables
2f-10=0
We move all terms containing f to the left, all other terms to the right
2f=10
f=10/2
f=5
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