Срочно помогите дам 30 балов

1. (x + y) + (x - y) = 5 + 7

2x = 12

x = 6

6 + y = 5

y = -1
2. x = 2y + 14

2(2y + 14) + 5y = 1

4y + 28 + 5y = 1

9y = -27

y = -3

x - 2(-3) = 14

x + 6 = 14

x = 8

x=8 y=-3