Question 738154
Nickels ----x
dimes -----------y


x=2y..........................(1)

Value of money. $1.60 = 160 cents

5x+!0y=160....................(2))

substitute x in eq (2)

5(2y)+!0y=160
10y+10y=160
20y=160
/20
y=8 number of dimes.

x=2y . so Nickels = 16

16*5+8*10=160