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f(-2)=3(-2)-5
We simplify the equation to the form, which is simple to understand
f(-2)=3(-2)-5
Reorder the terms in parentheses
+(-2f)=3*(-2)-5
Remove unnecessary parentheses
-2f=+3+*(-2+)-5
Reorder the terms in parentheses
-2f=+(-6)-5
Remove unnecessary parentheses
-2f=-6-5
We move all terms containing f to the left and all other terms to the right.
-2f=-6-5
We simplify left and right side of the equation.
-2f=-11
We divide both sides of the equation by -2 to get f.
f=5.5
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