f (x) = 5x-9. if f(x) =16, find the value of x
Mathematics · Middle School · Thu Feb 04 2021
Answered on
Given the function:
f(x) = 5x-9
if f(x) =16, find the value of x
Solution:
Equate the values of f(x) in one single equation.
f(x) = 5x - 9
16 = 5x - 9
Solve for x. The first step is to transpose -9 to the other side of the equation, hence it must be taken to note that in transposing a number, the sign changes.
16 + 9 = 5x
5x = 25
Divide both sides by 5 in order to determine the value of x.
5x/5 = 25/5
x = 5
Final answer:
x = 5