Question

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

Answer 1

2 x 2 = 5 + y

4-5 =y

y= -1

4(-1)=-20 + 8 x 2

-4= 20+ 16

-4= 36

36+4=0

Ans) 40