Question

5.In a 2 digit number, the digit at tens place is 7 and the sum of the digit is 8 times
the digit at unit place, then the number is il.​

Answer 1

Answer:

71

Step-by-step explanation:

In the two-digit number, let the digit in the unit's place is x and the digit in the tens place is 7.

∴ The number is 10(7)+x=70+x

Sum of digits =8 times the digit in the unit's place.

∴ Sum of both the digits =8× digit at units place

∴7+x=8×x

∴7=7x

∴x=1

Now, substituting x=1 in the required number 70+x, we get

70+x=70+1=71