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jeruk=j
3m+4j=81000
2m+6j=104000
x2 6m+8j=162000
x3 6m+18j=312000-
-10j=-150000
j=-150000/-10
j=15000
x3 9m+12j=243000
x2 4m+12j=208000-
5m =35000
m=35000/5
m=7000
harga 5kg mangga + 5kg jeruk
5m+5j
5(7000)+5(15000)
35000+75000
110000
jadi harga 5 kg mangga dan 5 kg jeruk adalah rp 110000