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3x - 7y = 41 ...(1)
4y = 10 - 2x
2x + 4y = 10 (bagi 2)
x + 2y = 5 ...(2)
Eliminasi persamaan (1) dan (2)
3x - 7y = 41
x + 2y = 5 (kali 3)
3x - 7y = 41
3x + 6y = 15
__________ -
-13y = 26
y = -2
Substitusi y = -2 ke persamaan (2)
x + 2(-2) = 5
x - 4 = 5
x = 9
2x + 5y = 2(9) + 5(-2) = 18 - 10 = 8