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-4-5f+1=13
We simplify the equation to the form, which is simple to understand
-4-5f+1=13
We move all terms containing f to the left and all other terms to the right.
-5f=+13+4-1
We simplify left and right side of the equation.
-5f=+16
We divide both sides of the equation by -5 to get f.
f=-3.2
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