Answer:
There isn't anything i can do when there isn't even a graph or a picture showing what it even looks like so I can't help you maybe re-post it with a picture then i can help.
FOLLOW ME FOR CLEARING YOUR NEXT DOUBT
You need to physically draw that on a graph
X+(x+2)+(x+4)= 66
3x+6=66
3x=60
x=20
20,22, and 24. so 20 is the answer
