2x + y - 6 = 1 X + 2y - 8 = 0

2x + y - 6 = 1 --> 2x + y = 7
x + 2y - 8 = 0 --> x + 2y = 8

2x + y = 7
x + 2y = 8 |×2

2x + y = 7
2x + 4y = 16
------------------(-)
- 3y = - 9
y = 3

2x + y = 7
2x + 3 = 7
2x = 7 - 3
x = 4 ÷ 2
x = 2