Please help!

Janine worked 15 hours last week. One job as a clerk in a sporting goods store paid her $7.58 per hour, while her job giving piano lessons paid $15 per hour. If she earned $173.06 between the two jobs, how many hours did she work at each job?

This may help :))

She worked 9 hours on store and gave piano lessons for 6 hours

Let x be the no. of hours she worked on store
Cost of 1 hour on shop = $8.47
Cost of x hours on shop = $8.47x
Let y be the no. of hours she gave piano lessons
Cost of 1 hour for piano lessons = $17
Cost of y hours on shop = $17y