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3x + y = 25000
4x + 2y = 42000
3x + y = 25000 (kalikan dua)
6x + 2y = 50000
6x + 2y = 50000
4x + 2y = 42000-
2x = 8000
x = 8000/2
x = 4000
3x + y = 25000
3(4000) + y = 25000
12000 + y = 25000
y = 25000 - 12000
y = 13000
Jadi harga mangga = 4000 dan jeruk = 13000
2 mangga = 4000*2 = 8000
4x + 2y=42000 x 1| 4x+2y=42000 -
2x = 8000
x= 8000/2
=4000
jadi harga 2kg mangga = 2 x 4000 = 8000