Question

a two digit number adds up to 7. if 27 is subtracted from the number it's digits are reversed. find the number?

Answer 1

The number is 52. If the 27 is subtracted from the number the digits are reversed to 25

Answer 2

good morning ...
have a good day.. let ten's digit number is equal to X and ones digit is equal to Y then according to question X + Y is equal to 7 this is the first equation and again 10 X + Y minus 27 is equal to 10 y+x.
then we get when we solve 10 X + Y - 27 is equal to 10 Y + x we get x minus Y is equal to 3 which is second equation on comparing both equation we get.
x is equal to 5 and Y is equal to 2 then we put these value in equation second 10 X + Y is equal to 27 then we get answer is 52.