Explain simply why 24 is the correct answer to: Jessica is six years older than Claire. In two years, Claire will be 20 years old. How old is Jessica now?. Explanation:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Claire's age now is 20 - 2 = 18 years old. Being 6 years older than Claire, Jessica is 18 + 6 = 24 years old.