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Mathematics, 01.04.2021 16:20 leeleegavin212

Erin earns $12 an hour giving music lessons, she earns $5 an hour babysitting. This weekend she worked 18 hours and earned a total of $139. How many hours did she babysit?

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Erin earns $12 an hour giving music lessons, she earns $5 an hour babysitting. This weekend she work...
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