pensil = p
buku = b
10b + 2p = 16.200 |x1| 10b + 2p = 16.200
5b + 4p = 9.900 |x2| 10b + 8p = 19.800
yg besar dikurangi yg kecil. jadi, 10b + 8b =19.800 - 10b + 2p =16.200
6p = 3.600
p = 3600/6
p = 600
ambil salah satu persamaan.
5b + 4p = 9.900
5b + 4. (600) = 9.900
5b + 2400 = 9900
5b = 9900 - 2400
5b = 7500
b = 7500/5
b = 1500
jadi, @p = 600 dan @b = 1500
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pensil=y
Jdi 1 pensil=600
1 buku=1500
pensil = p
buku = b
10b + 2p = 16.200 |x1| 10b + 2p = 16.200
5b + 4p = 9.900 |x2| 10b + 8p = 19.800
yg besar dikurangi yg kecil. jadi, 10b + 8b =19.800 - 10b + 2p =16.200
6p = 3.600
p = 3600/6
p = 600
ambil salah satu persamaan.
5b + 4p = 9.900
5b + 4. (600) = 9.900
5b + 2400 = 9900
5b = 9900 - 2400
5b = 7500
b = 7500/5
b = 1500
jadi, @p = 600 dan @b = 1500