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f(3)=3*3+2(3)
We simplify the equation to the form, which is simple to understand
f(3)=3*3+2(3)
Simplifying:
f*(3)=+9+2*(3)
Reorder the terms in parentheses
+(+3f)=+9+2*(3)
Remove unnecessary parentheses
+3f=+9+2+*(+3+)
Reorder the terms in parentheses
+3f=+9+(+6)
Remove unnecessary parentheses
+3f=+9+6
We move all terms containing f to the left and all other terms to the right.
+3f=+9+6
We simplify left and right side of the equation.
+3f=+15
We divide both sides of the equation by 3 to get f.
f=5
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