1. 28+y=5 2x+3y=11 2. 2e-y=-3 -22e+5y=21

1)
28 + y = 5
y = – 23
2x + 3(-23) = 11
2x – 69 = 11
2x = 80
x = 40

x + 2y
= 40 + 2(-23)
= -6