f(-3)=-2(-3)-3

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Solution for f(-3)=-2(-3)-3 equation:


f(-3)=-2(-3)-3

We simplify the equation to the form, which is simple to understand 
f(-3)=-2(-3)-3

Reorder the terms in parentheses
+(-3f)=-2*(-3)-3

Remove unnecessary parentheses
-3f=-2+*(-3+)-3

Reorder the terms in parentheses
-3f=+(+6)-3

Remove unnecessary parentheses
-3f=+6-3

We move all terms containing f to the left and all other terms to the right. 
-3f=+6-3

We simplify left and right side of the equation. 
-3f=+3

We divide both sides of the equation by -3 to get f. 
f=-1

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