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-f/4+7=-18
We simplify the equation to the form, which is simple to understand
-f/4+7=-18
We move all terms containing f to the left and all other terms to the right.
-0.25f=-18-7
We simplify left and right side of the equation.
-0.25f=-25
We divide both sides of the equation by -0.25 to get f.
f=100
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