a number cosist of 2 digits.when the number is divided by the units digit.the answer is 3.if the digits are reversed.the new number exceeds the original no. by 36.determine the original number
t = 10's digit and u = unit's digit.
(10t + u)/u = 3
Multiply both sides by u
10t + u = 3u
10t = 2u
5t = u
10u+t =36 + 10t + u
9u - 9t =36
divide by 9
u-t = 4 use this eqution along with the first equation
Substitute u = 5t to find u and then find t.
Check your answer.