2x - 5y =15 dan 3x +4y =11

2x - 5y = 15
3x + 4y = 11

(2x - 5y = 15) × 4
(3x + 4y = 11) × 5

8x - 20y = 60
15x + 20y = 55
___________+
23x = 115
x = 115/23
x = 5

3x + 4y = 11
3(5) + 4y = 11
15 + 4y = 11
4y = 11 - 15
4y = - 4
y = - 4/4
y = - 1

Maaf Kalau Salah