Question

in a 2-digit number , the unit s digit is four times the tens digit and the sum of the digits is 10. find the number​

Answer 1

Answer:

the number is 28

Step-by-step explanation:

Let the tens digit be x

so, unit digit = 4x

given, sum of the digits is 10

so, x + 4x = 10

5x = 10

x = 2

now,4x = 4(2)

= 8

Hence, the number is 28

Answer 2

Answer:

let the two digit number is xy

then 4 x = y

and X + Y= 10. (1eq)

so 4 x -y=0 (2eq)

add equation 1 and 2

x+4x+y-y=10

5x=10

x=2

y=8