Question 326692
let dimes be x numbers
Nickels = x-9
total value= 315 cents
..
value of dimes + value of nickels = total value
10x+5(x-9)=315
10x+5x-45=315
15x-45=315
add 45
15x-45+45=315+45
15x=360
divide by 15
15x/15= 360/15
x=24 = number of dimes
nickels will be 24-9=15
..
CHECK
15*5+24*10=315