f(-2)=2(-2)

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Solution for f(-2)=2(-2) equation:


f(-2)=2(-2)

We simplify the equation to the form, which is simple to understand 
f(-2)=2(-2)

Reorder the terms in parentheses
+(-2f)=2*(-2)

Remove unnecessary parentheses
-2f=+2+*(-2+)

Reorder the terms in parentheses
-2f=+(-4)

Remove unnecessary parentheses
-2f=-4

We move all terms containing f to the left and all other terms to the right. 
-2f=-4

We simplify left and right side of the equation. 
-2f=-4

We divide both sides of the equation by -2 to get f. 
f=2

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