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LEVEL-2|15. Seven times a two-digit number is equal to four times the number obtained by reversithe digits. If the difference between the digits is 3. Find the number. |
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Answer» Answer: Step-by-step explanation: let the DIGIT at TENS place be x and digit at units place be y So the number is 10x + y And reversed number is 10y + x So, (10x + y) 7 = (10y + x) 4 So, y = 2x We know that y-x = 3 So, 2x - x = 3 ...... As y = 2x...substitute value of y So, x = 3 and y = 6 Thus the number is 36 |
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