misal,
Jeruk = a
mangga = b
maka,
4a + 6b = 6.500...persamaan 1
3a + 2b = 3.000...persamaan 2
Eliminasikan
4a + 6b = 6.500 |× 1| 4a + 6b = 6.500
3a + 2b = 3.000 |× 3| 9a + 6b = 9.000 -
-5a = -2.500
a = -2.500/-5
a = 500
Substitusikan
3a + 2b = 3.000
3(500) + 2b = 3.000
1.500 + 2b = 3.000
2b = 3.000 - 1.500
2b = 1.500
b = 1.500/2
b = 750
Harga 2 jeruk dan 6 mangga
= 2a + 6b
= 2(500) + 6(750)
= 1.000 + 4.500
= Rp. 5.500,-
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misal,
Jeruk = a
mangga = b
maka,
4a + 6b = 6.500...persamaan 1
3a + 2b = 3.000...persamaan 2
Eliminasikan
4a + 6b = 6.500 |× 1| 4a + 6b = 6.500
3a + 2b = 3.000 |× 3| 9a + 6b = 9.000 -
-5a = -2.500
a = -2.500/-5
a = 500
Substitusikan
3a + 2b = 3.000
3(500) + 2b = 3.000
1.500 + 2b = 3.000
2b = 3.000 - 1.500
2b = 1.500
b = 1.500/2
b = 750
maka,
Harga 2 jeruk dan 6 mangga
= 2a + 6b
= 2(500) + 6(750)
= 1.000 + 4.500
= Rp. 5.500,-