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f(5)=5(5)-6
We simplify the equation to the form, which is simple to understand
f(5)=5(5)-6
Reorder the terms in parentheses
+(+5f)=5*(5)-6
Remove unnecessary parentheses
+5f=+5+*(+5+)-6
Reorder the terms in parentheses
+5f=+(+25)-6
Remove unnecessary parentheses
+5f=+25-6
We move all terms containing f to the left and all other terms to the right.
+5f=+25-6
We simplify left and right side of the equation.
+5f=+19
We divide both sides of the equation by 5 to get f.
f=3.8
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