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jeruk = x
sisir pisang = y
ita = i
ani = a
maya = m
i: 3x + 4y = 26500
a: 5x + 3y = 29500
m: 2x + y = 50000 - ....
Eliminasi persamaan (i) dan (a)
3x + 4y = 26500 (dikali 5)
5x + 3y = 29500 (dikali 3)
15x + 20y = 132500
15x + 9y = 88500
——————————— -
11y = 44000
y = 44000/11
y = 4000
Substitusi y = 4000 dengan persamaan (i)
3x + 4y = 26500
3x + 4.4000 = 26500
3x + 16000 = 26500
3x = 26500 - 16000
3x = 10500
x = 10500/3
x = 3500
Uang yang harus dibayar maya
2x + y =
= 2.3500 + 4000
= 7000 + 4000
= 11000
uang kembalian yang diterima maya:
50000 - 11000= 39000 (d)