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2x + 3y = 23 / ×4 / 8x + 12y = 92 _
- 22y = -110
y = 5
2x + 3y = 23
2x + 3.(5) = 23
2x + 15 = 23
2x = 23 - 15
2x = 8
x = 4
Jadi, Himpunan penyelesaian dari 4x - 5y = -9 dan 2x + 3y = 23 adalah (4,5) atau (4x,5y)
2x + 3y = 23 | x2
4x - 5y = -9
4x + 6y = 46 _
-11y = -55
-11 -11
y = 5
4x - 5y = -9
4x - 5 (5) = -9
4x - 25 = -9
4x = -9 + 25
4x = 16
4 4
x = 4