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f(-4)=(-8)+2
We simplify the equation to the form, which is simple to understand
f(-4)=(-8)+2
Reorder the terms in parentheses
+(-4f)=(-8)+2
Remove unnecessary parentheses
-4f=+(-8+)+2
Remove unnecessary parentheses
-4f=-8+2
We move all terms containing f to the left and all other terms to the right.
-4f=-8+2
We simplify left and right side of the equation.
-4f=-6
We divide both sides of the equation by -4 to get f.
f=1.5
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