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-f+2+4f=8-3f-f+2+4f=8-3f
We move all terms to the left:
-f+2+4f-(8-3f-f+2+4f)=0
We add all the numbers together, and all the variables
-f+4f+2-10=0
We add all the numbers together, and all the variables
3f-8=0
We move all terms containing f to the left, all other terms to the right
3f=8
f=8/3
f=2+2/3
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