Let the numbers =n, n+1, n+2
n+(n+1)+(n+2) =60
3n = 60 - 1 - 2
3n = 57 divide both sides by 3
n= 57 /3
n=19, 20, 21 are your 3 numbers.
they are 19 20 & 21
19+20+21=60
