Let's assign John and Alex's points a variable.
John's Points: 2x-1
Alex Points: x
Now, let's set up an equation.
x+2x-1=23
Simplify.
3x-1=23
3x=23+1=24
3x=24
Now, to find x, or Alex's score, we divide.
24/3=8
Alex's Points= 8
Johns Points= (8*2)-1=15
There is your answer. If I helped than please vote brainliest!