Joyce and Tina had an equal amount of money. Each day, Joyce spent $24 and tina spent $28. When Tina spent all her money, Joyce still had $64 left. In how many days did Tina spent all her money?

Joyce and Tina had an equal amount of money

Lets x = # of days they spent money

Joyce spent $24 still had $64 left = 24x + 64

Tina spent $28 a day and spent all her money, no left = 28x

Both has equal amount of money so

28x = 24x + 64

Subtract 24x from both sides

4x = 64

Divide both sides by 4

x = 16

Answer:

Tina spent all her money in 16 days.