Question

A number exceeds other number by 12. If their sum is 72, find the numbers

Answer 1

Let the numbers to be x and y .
ATQ        y = x +12
and          x + x +12 = 72
                  2x + 12 = 72
                        2x = 60
                       x = 30
Hence the numbers are 30 and 42.
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Answer 2

let one is x
then other one is x +12
now
x +(x+12) = 72
2x = 72-12
x = 60/2 = 30
hence the numbers are 30
and (30+12)= 42