Julio has $127 in his bank account. He gets $30 for his birthday. He also has a part-time job that pays $9 per hour. How many hours will he need to work to have $220 in his bank account?

Answer: he needs to work for 7 hours.

Step-by-step explanation:

Let x represent the number of hours that he need to work to have $220 in his bank account.

Julio has $127 in his bank account. He gets $30 for his birthday. Since the total amount he wants to have in his bank account is 220, it means that the remaining amount he needs to save is

220 - (127 + 30) = 63

He also has a part-time job that pays $9 per hour. It means that the amount that he would earn if he works for 9 hours is 9x. Therefore,

9x = 63

x = 63/9

x = 7

7 hours

Step-by-step explanation:

127+30+9x=220

157+9x=220

9x=63

x=7