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2x + 3y = 13. | dikali 3| 6x + 9y = 39
3x + 4y = 19. | dikali 2| ==>. 6x + 8y = 38
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y = 1
lalu y dimasuk kan
2x + 3(1) = 13
2x + 3 = 13
2x = 13 - 3
2x = 10
x = 10/2
x = 5
himpunan
x = 5
y = 1