Question

Tommy works two jobs. As a clerk he earns

$7 an hour. As a receptionist he makes $9 an
hour. One week he worked 24 hours and
earned $200. How many hours did he work
at each job that week?

Answer 1

Clerk: 8 hours

Receptionist: 16 hours

Explanation:

Hours as a clerk: x

Hours as a receptionist: y

x + y = 24

x = 24 - y

7x + 9y = 200

7(24 - y) + 9y = 200

168 - 7y + 9y = 200

2y = 32

y = 16

x = 24 - 16 = 8