To solve this system of equations, Ayana isolated y in the first equation and then substituted for y in the second equation. What was the result? | 2y = 8 z2 + y = 5 O A. x2 + 8x = 5 O B. x2 + 4x2 = 5 O c. x2 + 4x = 5 D. x2 + 8x2 = 5