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f(2)=-3(2)+7
We simplify the equation to the form, which is simple to understand
f(2)=-3(2)+7
Reorder the terms in parentheses
+(+2f)=-3*(2)+7
Remove unnecessary parentheses
+2f=-3+*(+2+)+7
Reorder the terms in parentheses
+2f=+(-6)+7
Remove unnecessary parentheses
+2f=-6+7
We move all terms containing f to the left and all other terms to the right.
+2f=-6+7
We simplify left and right side of the equation.
+2f=+1
We divide both sides of the equation by 2 to get f.
f=0.5
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