Question

What is this function’s input if its output is 11? f(x) = 2x + 5

Answer 1

x=3 is the answer you want took a test

Answer 2

Set everything to 11

11 is your f(x)

11=2x+5

Solve for x, subtract 5 on both sides and you get

11-5=2x

6=2x Now divide by two on both sides

x=3