Respuesta :

17=3+8x 
14=8x
1.75=x

plug in 1.75 to x in 4x+9
17 = 3 + 8x
-3 -3
--------------
14 = 8x
--- ---
8 8

1.75 = x

x = 1.75

Then you plug in 1.75....

4(1.75) + 9 = 16


The answer is 16