Jessica has 9 more nickels than dimes, and the total value of her coins is 1.50. How many nickels does she have. Write the best equation.

Answer 1

d = n-9

5 n + 10 d = 150 cents

5 n + 10(n-9) = 150

15 n -90 = 150

15 n = 240

n = 16