Gunakan metode campuran 3x+2y = -1 2x+y =2

3x + 2y = -1 » ×2 » 6x + 4y = -2
2x + y = 2 » ×3 » 6x + 3y = 6

6x + 4y = -2
6x + 3y = 6 _
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y = - 8

2x - 8 = 2
2x = 2 + 8
2x = 10
x = 10 ÷ 2
x = 5