boleh minta bantuannya buat nomor 4?

jawab

berat pepaya = x
berat  jeruk  = y

a.model matematika
4.000 x + 5.000 y = 25.000 → 4x + 5y = 25
4.500 x + 4.500 y = 24.750 → 2x + 2y = 11

b.
4x + 5y = 25
2x + 2y = 11 || kali 2

4x + 5y = 25
4x + 4y = 22 || (-)
y = 3

4x + 5y = 25
4x +5(3) = 25
4x = 25 -15 = 10
x = 2,5
Pepaya  = x = 2,5 kg
jeruk = y = 3 kg