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26=-7+2f-4f+3
We move all terms to the left:
26-(-7+2f-4f+3)=0
We add all the numbers together, and all the variables
-(-2f-4)+26=0
We get rid of parentheses
2f+4+26=0
We add all the numbers together, and all the variables
2f+30=0
We move all terms containing f to the left, all other terms to the right
2f=-30
f=-30/2
f=-15
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