Use substitution to solve.
2x² = 5 + y
4y = -20 + 8x²
Solve the first equation for y and substitute it into the second equation. The resulting equation is
A. 4y = 16x² - 60
B. 8x² - 20 = -20 + 8x²
C. 2x² = 5 + 2x² - 5