Question

the sum of the digits of a two digit number is 7 if the digits are reversed the new number is increased by 3 equals 4times the original number.fijd the original number

Answer 1

take the no as 10x + y
and reversed digits as 10y + X

given X + y = 7

10y + X + 3=4 X original

take the first n second equation just above this and after simplification use elimination method to solve and substitute later the values on 10x+ y