help! Please show work this is my last question! ʕ•ᴥ•ʔ

Answer:
Here
Step-by-step explanation:
Input for x on first input is 7! 2*7+4
Input for x on second input is 9 2*9+4
Input for x on third input is 15 2*15+4
Answer:
(7, 18) (9, 22) (15, 34)
Step-by-step explanation:
so all you have to do is substitute the values given
substitute the input into x
wait a minute.. its output so what you ACTUALLY have to do is
18 = 2x + 4
then solve for the inputs
14 = 2x
x = 7
22 = 2x + 4
18 = 2x
x = 9
34 = 2x + 4
30 = 2x
x = 15