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f(8)=4(8)-8
We simplify the equation to the form, which is simple to understand
f(8)=4(8)-8
Reorder the terms in parentheses
+(+8f)=4*(8)-8
Remove unnecessary parentheses
+8f=+4+*(+8+)-8
Reorder the terms in parentheses
+8f=+(+32)-8
Remove unnecessary parentheses
+8f=+32-8
We move all terms containing f to the left and all other terms to the right.
+8f=+32-8
We simplify left and right side of the equation.
+8f=+24
We divide both sides of the equation by 8 to get f.
f=3
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