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Mathematics, 23.03.2020 21:40 EatsChiken

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David can earn 400 dollars in 10 hours of inflating balloons for kids. He wants to know how much he can earn if he spends 20 hours doing the same thing.
Select all the equations from the below answer choices which can be used to find the answer.
A - 400/10 = x/20
B - 400/x = 10/20
C - 400/10 = x/200
D - 400/100 = x/20

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