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k = 2p
3k + 2p = 160 000
Ditanya: 5k + p = ?
Jawab:
3k + 2p = 160 000 -----> k = 2p
3(2p) + 2p = 160 000
6p + 2p = 160 000
8p = 160 000
p = 20 000
3 kaos + 2 celana pendek =RP.160.000
harga celana pendek = 3.2+2=8
=RP.160.000: 8
=RP.20.000
jadi harga 5 kaos dan 1 celana pendek = RP.40.000*5 +1*RP.20.000
=RP220.000