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f(4)=8(16)-4(4)
We simplify the equation to the form, which is simple to understand
f(4)=8(16)-4(4)
Reorder the terms in parentheses
+(+4f)=8*(16)-4*(4)
Remove unnecessary parentheses
+4f=+8+*(+16+)-4+*(+4+)
Reorder the terms in parentheses
+4f=+(+128)-4*(4)
Remove unnecessary parentheses
+4f=+128-4+*(+4+)
Reorder the terms in parentheses
+4f=+128+(-16)
Remove unnecessary parentheses
+4f=+128-16
We move all terms containing f to the left and all other terms to the right.
+4f=+128-16
We simplify left and right side of the equation.
+4f=+112
We divide both sides of the equation by 4 to get f.
f=28
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