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4p+5s=50000 |x4| 16p+20s=200000
___________________ _
14p=140000
p=10000
4p+5s=50000
40000+5s=50000
5s=10000
s=2000
p= pensil
s=spidol
semoga membantu
4x + 5y = 50.000 × 4
30x + 20y = 340.000
16x + 20y = 200.000
14x = 140.000
x = 140.000
14
= 10.000
4x + 5y = 50.000
40.000 + 5y = 50.000
5y = 50.000 - 40.000
= 10.000
y = 10.000
5
= 2000
(pensil)x = 10.000
(spidol)y = 2000