1. buku = a
pensil = b
8a + 6b = 14400 | x3 | 24a + 18b = 43200
6a + 5b = 11200 | x4 | 24a + 20b = 44800
43200 - 44800 = -2b
b = 800
8a + 6(800) = 14400
a = 1200
tinggal masukan berapa jumlah yg ditentukan, dengan harga buku 1200 dan pensil 800
berlaku caranya untuk nomor 2
semoga membantu
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1. buku = a
pensil = b
8a + 6b = 14400 | x3 | 24a + 18b = 43200
6a + 5b = 11200 | x4 | 24a + 20b = 44800
43200 - 44800 = -2b
b = 800
8a + 6(800) = 14400
a = 1200
tinggal masukan berapa jumlah yg ditentukan, dengan harga buku 1200 dan pensil 800
berlaku caranya untuk nomor 2
semoga membantu
6b+5p = 11.200 (x6)
= 40b+30p= 72.000
= 36b+30p= 67.200
------------------------------ -
= 4b = 4.800
= b = 1.200
maka p = 8(1.200)+6p = 14.400
= 9.600+6p = 14.400
= 6p = 14.400-9.600
= 6p = 4.800
= p = 800
2. 2b+c = 140.000 (x2)
3b+2c = 235.000 (x1)
-------------------------------------
4b+2c = 280.000
3b+2c = 235.000
_______________ -
b = 45.000
maka c = 2(45.000)+c = 140.000
= 90.000+c = 140.000
= c = 140.000-90.000
c = 50.000
Note: 1) b = buku p = pensil
2) b = baju c = celana
Semoga bisa membantu