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500x+5.000y=115.000 ⇒ x+10y=230
x+y=50
x+10y=230
------------------ -
-9y= -180
y=20
x+y=50
x+20=50
x=50-20
x=30
jadi jumlah uang 500an=30, dan jumlah uang 5000an=20
=30 keping uang logam lima ratus= Rp.115.000.00
maaf ya kalo salah