Find the Age of John

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?




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Gamers

In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.