The ten digit of a certain two-digit number exceeds the unit digity by 4 and is 1 less than twice the one digit. Find the two-digit number?

Question

It is a question related with topic linear equation

Answer 1

Let x=the ten digit

Let y=the unit digit

x=y+4 (ten digit is 4 greater than the unit digit)

x=2y-1 (ten digit is 1 less than twice the unit digit)

subtract 1st equation from 2nd

0=y-5 or y=5 x=5+4=9

the two digit number is 95