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24-11-2016
Mathematics

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Fifteen people volunteer for a park cleanup. The number of volunteers increases by 7 people each month for several months. After how many months will there be 50 volunteers?

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nobillionaireNobley nobillionaireNobley

27-11-2016

Let x be the number of months, then
15 + 7x = 50
7x = 50 - 15 = 35
x = 35/7 = 5

Therefore, there will be 50 volunteers after 5 months.

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