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maaf ya kalau salah karena ini di jawab dengan coret coretan
Kaos : y
1x = 3y
2y + 3x = Rp.110.000
2y + 9y = Rp.110.000
11y = Rp.110.000
y = Rp.110.000 / 11
y = Rp.10.000
...
...
5y = 5 × Rp.10.000
= Rp.50.000
...maaf kalau salah