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InterchanginyThe ones digit of a 2 digit number is twice the tens digit. When the numberformed by reversing the digits is added to the original number, the sum is 99. Findthe original number.157 |
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Answer» let once digit = 2x and tens digit = x so no = 10x +2x = 12x reverse no = 20x + x = 21xgiven, 21x + 12x = 99 33x =99 x = 3 no original = 10*3+2*3 =36reverse no = 10*3*2 + 3 = 63 |
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