Find the value of x when 5^x+5^x+5^x+5^x=500

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A 3
B 100
C 10
D 5

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Answer: A. 3

Let's assume 5^x to be y. There are 4y which is equal to 500. So 4y=500 -> y=125. If y=5^x=125, the value of x is 3.

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Find the value of x when 5^x+5^x+5^x+5^x=500

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