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4(f+3)=3
We move all terms to the left:
4(f+3)-(3)=0
We multiply parentheses
4f+12-3=0
We add all the numbers together, and all the variables
4f+9=0
We move all terms containing f to the left, all other terms to the right
4f=-9
f=-9/4
f=-2+1/4
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