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3f-7f=f+11
We move all terms to the left:
3f-7f-(f+11)=0
We add all the numbers together, and all the variables
-4f-(f+11)=0
We get rid of parentheses
-4f-f-11=0
We add all the numbers together, and all the variables
-5f-11=0
We move all terms containing f to the left, all other terms to the right
-5f=11
f=11/-5
f=-2+1/5
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