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f(-1)=3(-1)-2
We simplify the equation to the form, which is simple to understand
f(-1)=3(-1)-2
Reorder the terms in parentheses
+(-1f)=3*(-1)-2
Remove unnecessary parentheses
-1f=+3+*(-1+)-2
Reorder the terms in parentheses
-1f=+(-3)-2
Remove unnecessary parentheses
-1f=-3-2
We move all terms containing f to the left and all other terms to the right.
-1f=-3-2
We simplify left and right side of the equation.
-1f=-5
We divide both sides of the equation by -1 to get f.
f=5
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