请做以下题目，求高手做出来。
Johnmeanttodivideanumberby2,buthewascarelessandsubtracted2fromthenumberinstead.Hegota...
John meant to divide a number by 2 , but he was careless and subtracted 2 from the number instead . He got an answer of 22 . What would his answer have been had he actually divided by 2 instead of subtracting 2 ?
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原本除以2变成减去2 得到的结果是22 则原值是24 24除以2 得12 答案是12
式子：22+2=24 24/2=12
式子：22+2=24 24/2=12
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