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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.​

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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