A girl has been getting her parents change every day for a year. She has dimes and half-dollars worth $30.00. If she has five times as many dimes as half-dollars, how many of each type of coin does she have?

Answer 1

d + h = 3000

d = 5 h

solve the system ... substitution looks good

Answer 2

update

10 d + 50 h = 3000

d = 5 h

solve the system ... substitution looks good