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Guess the number

Algebra Level pending

Marvin chose a number, multiplied it by 6, then added 14 to the result and got 104. What was the number?

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

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including olympiad champions, researchers, and professionals.

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