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if Lauren's age is half of Joe's age and lauren is 4. How old is Joe

  • 初等代数
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解答

ifLauren′sageishalfofJoe′sageandlaurenis4.HowoldisJoe

解答

Joe′sageis:8
求解步骤
Translate the problem into an equation:21​x=4
求解 x,21​x=4:x=8
Joe′sageis:8

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