mohon bantuannya Jawab kan pake caranya nya

2) 4x - 3y = - 8 |×2
5x + 2y = 13 |×3

8x - 6y = - 16
15x + 6y = 39
---------------------(+)
23x = 23
x = 1

4x - 3y = - 8
4(1) - 3y = - 8
- 3y = - 8 - 4
y = 4

a - 2 = 1
a = 1 + 2
a = 3 (D)