Question

A number has two digits. The digit at tens place is four times the digit at units place. If 54
is subtracted from the number, the digits are reversed. Find the number.​

Answer 1

Answer:

Step-by-step explanation:

let the tens digit be x and let the units digit be y

therefore the number is 10x+y

x=4y

x-4y=0(mark as 1)

10x+y-54=10y+x

9x-9y=54

x-y=6(mark as 2)

subtracting 1 and 2

x-4y=0

-x+y=-6

-3y=-6

y=2

x=8

so the number is 82