Remark
Let f(x) = y must to make it easier to write.
Equation
Original Equation: y = (x - 5)/3
Inverse
Interchange the x and y. You get x = (y - 5) / 3
Solve for y in the inverse.
x = (y - 5)/3 Multiply by 3
3x = y - 5 Add 5 to both sides.
3x + 5 = y
substitute f1(x) back into the equation.
3x + 5 = f(x) Now put in 3 for x
f(3) = 3x + 5
f(3) = 3*3 + 5
f(3) = 14 <<< Answer
