Question

The tens digit of a two-digit number is two more than its unit digit. The two-digit number is 7 times the sum of the
digits. Find the units digits?​

Answer 1

Question.

The tens digit of a two-digit number is two more than its unit digit. The two-digit number is 7 times the sum of the

digits. Find the units digits?

Answer.

consider unit digit= x

tens digit = x+2

two digit number is writen as 10(x+2) + x

A/Q,

10(x+2)+x =7((x+2)+x)

11x +20 = 7(2x +2)= 14x +14

20 -14 = 14x - 11x

6 = 3x

x = 2

the number will be 10(2+2)+2 = 42

unit digit = 2