Question: this 5.) Melody picks a number. She doubles the number, squares the result, divides the square by 3, subtracts 30 from the quotient, and gets

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5.) Melody picks a number. She doubles the number, squares the result, divides the square by 3, subtracts 30 from the quotient, and gets 18. What are the possible numbers that Melody could have picked? What operation does Melody perform that prevents us from knowing with 100% certainty which number she picked

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