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-4f-13=4(-f-2)
We move all terms to the left:
-4f-13-(4(-f-2))=0
We add all the numbers together, and all the variables
-4f-(4(-1f-2))-13=0
We calculate terms in parentheses: -(4(-1f-2)), so:We get rid of parentheses
4(-1f-2)
We multiply parentheses
-4f-8
Back to the equation:
-(-4f-8)
-4f+4f+8-13=0
We add all the numbers together, and all the variables
-5!=0
There is no solution for this equation
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