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