harga 3 kg jeruk dan 2 kg apel Rp85.000,00, sedangkan harga 1 kg jeruk dan 3 kg apel Rp75.000,00. harga 2 kg jeruk dan 4 kg adalah

Jeruk = x
Apel = y
3x + 2y = 85
x + 3y = 75

Jika, x + 3y = 75
x = 75 - 3y

3x + 2y = 85
3(75 - 3y) + 2y = 85
225 - 9y + 2y = 85
225 - 7y = 85
-7y = 85 - 225
-7y = -140
y = 20

x = 75 - 3y = 75 - 3(20) = 75 - 60 = 15

Maka, 2x + 4y = 2(15) + 4(20) = 30 + 80 = 110

Maka 2 kg jeruk dan 4 kg apel seharga 110.000