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Bolpoin = y
2x + 3y = 10.200.....1
3x + 4y = 14.400.....2
Mencari nilai x dan y
pers 1 dikalikan 3
pers 2 dikalikan 2
Sehingga :
6x + 9y = 30.600.....1
6x + 8y = 28.800.....2 -
y = 1.800
2x + 3y = 10.200
2x + 3*1.800 = 10.200
2x + 5.400 = 10.200
2x = 10.200 - 5.400
2x = 4.800
x = 4.800/2
x = 2.400
Jadi harga 1 buku = 2.400
Dan harga 1 bolpoin = 1.800
Semoga membantu :)
p : bolpen
2b + 3p = 10200 (3x) > > > 6b + 9p = 30600
3b + 4p = 14400 (2x) > > > 6b + 8p = 28800
(eliminasi) ------------------------- -
p = 1800
2b + 3p = 10200
2b + 3(1800) = 10200
2b = 10200 - 5400
2b = 4800
b = 2400
jadi 1 buku + 1 bolpen : 2400 + 1800 = 4200