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6x = 5y
4x + 3y = 114.000
Bu Aning : x + 2y = ?
6x = 5y
x = 5y/6
4(5y/6) + 3y = 114.000
20y/6 + 3y = 114.000 (kali 6)
20y + 18y = 684.000
38y = 684.000
y = 18.000
x = 5(18.000)/6 = 5(3.000) = 15.000
Bu Aning : 15.000 + 2(18.000) = 15.000 + 36.000 = 51.000
Jadi, bu aning membayar Rp 51.000,00.