Question

Given that f(x) = 2x −5, find the value of x that makes f(x) = 15.

Answer 1

f(x) = 2 x - 5

15 = 2 x - 5

2 x - 5 = 15

2 x = 15 + 5

2 x = 20

x = 20 / 2

x = 10

hope this helps!