Question

1) - 2x + 4y = -9
9x - 2y = 2
substitute​

Answer 1

Answer:

x=2+2y ÷ 9     -(3)  (from equation 2)

(3) in (1)

-2 (2+2y ÷  9) +4y = -9

-4 - 4y ÷ 9  +4y = -9

-4 -4y +36y ÷ 9 = -9

-4 - 4y +36y = -81

32y= -81 + 4

y=77/32 -(4)

(4) in (3)

x= 2+2 *77/32 ÷9

x= 981/16