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f (-2)=3 (-2+4)-2-2
We simplify the equation to the form, which is simple to understand
f(-2)=3(-2+4)-2-2
Simplifying terms in parentheses
f*(-2)=3*(+2)-2-2
Reorder the terms in parentheses
+(-2f)=3*(+2)-2-2
Remove unnecessary parentheses
-2f=+3+*(+2+)-2-2
Reorder the terms in parentheses
-2f=+(+6)-2-2
Remove unnecessary parentheses
-2f=+6-2-2
We move all terms containing f to the left and all other terms to the right.
-2f=+6-2-2
We simplify left and right side of the equation.
-2f=+2
We divide both sides of the equation by -2 to get f.
f=-1
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