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f (3)=2 (3-4)+5
We simplify the equation to the form, which is simple to understand
f(3)=2(3-4)+5
Simplifying terms in parentheses
f*(3)=2*(-1)+5
Reorder the terms in parentheses
+(+3f)=2*(-1)+5
Remove unnecessary parentheses
+3f=+2+*(-1+)+5
Reorder the terms in parentheses
+3f=+(-2)+5
Remove unnecessary parentheses
+3f=-2+5
We move all terms containing f to the left and all other terms to the right.
+3f=-2+5
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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