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The letters a, b, c, and d are each represented by different single digit integers. When the four-digit number abcd is multiplied by 9, the result is the four-digit number dcba. In other words, the digits
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The letters a, b, c, and d are each represented by different single digit integers. When the four-digit number abcd is multiplied by 9, the result is the four-digit number dcba. In other words, the digits have been reversed after the multiplication.

User Jamian
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the answers are: a= 1, b= 0, c=8, d=9, hope that helped
User Geraldo
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