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0.5(2f+6)=-1
We move all terms to the left:
0.5(2f+6)-(-1)=0
We add all the numbers together, and all the variables
0.5(2f+6)+1=0
We multiply parentheses
f+3+1=0
We add all the numbers together, and all the variables
f+4=0
We move all terms containing f to the left, all other terms to the right
f=-4
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