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f(5)=3(5)-7
We simplify the equation to the form, which is simple to understand
f(5)=3(5)-7
Reorder the terms in parentheses
+(+5f)=3*(5)-7
Remove unnecessary parentheses
+5f=+3+*(+5+)-7
Reorder the terms in parentheses
+5f=+(+15)-7
Remove unnecessary parentheses
+5f=+15-7
We move all terms containing f to the left and all other terms to the right.
+5f=+15-7
We simplify left and right side of the equation.
+5f=+8
We divide both sides of the equation by 5 to get f.
f=1.6
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