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3S + 5P = 13.750-------- x5
5S + 2P = 15.000-------- x3
> 15S + 25P = 68.750
15S + 6P = 45.000
____________________--
19P = 23.750
P = 1.250
5S + 6P = 15.000
5S + 6x1250 = 15000
5S = 15000 - 7500
S = 7500 : 5
S = 1500
2S + 3P = 2x1500 + 3x1250 = Rp 3750
5s + 2p = Rp. 15.000. x3 = 15s + 10p = 30000
15s + 25p = 68750
15s + 10p = 30000
___________________ -
15p = 38750
p = 38750
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15
p = 2583
5s + 2p = 15000
5s + 2x2583 = 15000
5s + 5166 = 15000
5s = 15000 - 5166
5s = 9834
s = 9834 : 5 = 1966
2 buah spidol = 2583 x 2 = 5166
3buah penggaris = 1966 x 3 = 5898