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Mathematics, 07.12.2020 23:40 onlymyworld27

Karen makes $5 per hour babysitting and $12 per hour giving music lessons. One weekend, she worked a total of 18 hours and made $139. How many hours did she spend babysitting?

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Karen makes $5 per hour babysitting and $12 per hour giving music lessons. One weekend, she worked a...
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