Harga 1 KG daging sapi dua kali harga 1 KG ikan tengiri. Harga 1 KG daging ayam 20.000 kurangnya dari harga 1 KG ikan tengiri Harga 1 KG daging sapi di tambah 2

1ds = 2it
1da = 1it - 20.000
*) 1ds + 2it + 1da = 230.000
2it + 2it + 1it - 20.000 = 230.000
5it = 250.000
1it = 50.000
*)1ds = 2it
1ds = 2 × 50.000
1ds = 100.000
*)1da = 1it - 20.000
1da = 50.000 - 20.000
1da = 30.000

ket :
*)da =daging ayam
*)ds = daging sapi
*)it =ikan tenggiri

daging sapi = x = 2z
daging ayam = y = z - 20000
daging ikan tenggiri = z

1 kg daging sapi + 2 kg daging ikan tenggiri + 1 kg daging ayam = 230000
x + 2 z + y = 230000
2z + 2z + z - 20000 = 230000
5z = 230000 + 20000
5z = 250000
z = 250000/5
z = 50000

daging ikan tenggiri = z = 50000

daging sapi = 2z = 2 x 50000 = 100000

daging ayam = z - 20000
= 50000 - 20000
= 30000