Answer:
90 nickels and 15 dimes
Step-by-step explanation:
If one is six times the other, then you would have 7 equal piles. Divide 105 by 7 to get 15 which is the number in each pile(number of dimes). Then 105 minus 15 gives you the total of the rest of the piles(number of nickels).
Check:
90 plus 15 equals 105, and
15 times 6 equals 90.
