Question 428610
Let x=N cents the cost of an orange. The cost of an apple is x+15 cents.
The  cost for 6 orange is: 6x cents
The cost for 8 apples is: 8(x+15) cents
The total cost for fruits is: 6x+8(x+15)=1170 => 14x=1050 => x=75 cents.

Answer:An orange cost 75 cents, N=75 cents.

Done.