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3f+6=-8+10f
We move all terms to the left:
3f+6-(-8+10f)=0
We add all the numbers together, and all the variables
3f-(10f-8)+6=0
We get rid of parentheses
3f-10f+8+6=0
We add all the numbers together, and all the variables
-7f+14=0
We move all terms containing f to the left, all other terms to the right
-7f=-14
f=-14/-7
f=+2
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