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B : Beras
4T + 3B = 39.000 ×5
2T + 5B = 37.000 ×3
20T + 15B = 195.000
6T + 15B = 111.000
14T = 84.000
T = 6.000
2T + 5B = 37.000
5B = 37.000 - 12.000
B = 5.000
3T + 2B
18.000 + 10.000 =
28.000
y = beras
4x+3y = 39000 | ×2 |
2x+5y = 37000 | ×4 |
8x+6y = 78000
8x+20y = 148000
______________ _
-14y = -70000
y = -70000/-14
y = 5000
4x+3y = 39000
4x+3.5000 = 39000
4x+15000 = 39000
4x = 39000-15000
4x = 24000
x = 6000
Jadi, harga 1 kg terigu adalah 6000, harga 1 kg beras 5000
3x+2y = 3.6000+2.5000
= 18000+10000
= 28000
Alhamdulillah selesai juga