Respuesta :

You do y=2x(4)+3
that equals 11 
so the coordinate is (4,11)
(4, ?).      Let ? = b

(4, b) on line y = 2x + 3

x =4, y = b.        

y = 2x + 3

b = 2*4 + 3

b = 8 + 3

b = 11.

The other half of coordinate is 11.