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apel = a
2j + 3a = 14000. dikali 1
1j + 2a = 8500. dikali 2
jadi
2j + 3a = 14000
2j + 4a = 17000
---------------------- -
-a = - 3000
a = 3000
substitusi nilai a
2j + 3a = 14000
2j + 3(3000) = 14000
2j + 9000 = 14000
2j = 14000-9000
2j = 5000
j = 2500
jadi jika jono ingin membeli 2 jeruk 1 apel adalah
2j + 1a
2(2500) + 1(3000)
5000 + 3000
= 8000
uang yg hrs dibayar jono adlh 8000