f(1)=-1/25(1)+15

Solution for f(1)=-1/25(1)+15 equation:

f(1)=-1/25(1)+15

We simplify the equation to the form, which is simple to understand 
f(1)=-1/25(1)+15

Simplifying:
f*(1)=-0.04*(1)+15

Reorder the terms in parentheses
+(+1f)=-0.04*(1)+15

Remove unnecessary parentheses
+1f=-0.04+*(+1+)+15

Reorder the terms in parentheses
+1f=+(-0.04)+15

Remove unnecessary parentheses
+1f=-0.04+15

We move all terms containing f to the left and all other terms to the right. 
+1f=-0.04+15

We simplify left and right side of the equation. 
+1f=+14.96

We divide both sides of the equation by 1 to get f. 
f=14.96