Question

a number has two digits the digit at 10 place is 4 times the digit at unit place if 54 is subtracted from the number the digits are reversed find the number​

Answer 1

Step-by-step explanation:

Let the digit at tens place be x

The digit as ones place be y

According to the question :

x- 4y = 0

10x + y - 54 = 10y + x

9x - 9y = 54

x - y = 6

By subtracting these two equations by elimination method

y = 2

Putting the value of y in any of the equations

x = - 4