Let x, x+2 & x+4 be the 3 integers.
x + 2 (x+2)= (x+4)+20
x + 2x + 4 = x + 4 + 20
3x + 4 = x + 24
3x - x = 24 - 4
2x = 20
x = 20/1
x=10 ans. for the smallest integer.
10 + 2 = 12 for the middle integer.
10 + 4 = 14 ans. for the largest integer.
To check:
10 + 2*12 = 14 + 20
10 + 24 = 34
34 = 34
