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Mallory makes $10 per hour babysitting and $8 per hour working at the local grocery store. Last week she babysat for 6 hours. Her total gross earnings for both jobs was $180. How many hours did she work at the grocery store?

Respuesta :

Mallory would have worked for 15 hours
10(6)+8x=180
60+8x=180
8x=120
x=15

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