a golfers score after 3 rounds is 216 shots. Each round his score increased by 2 shots. What was his score on the first shot. (its not 212 or 210 btw)

70

Step-by-step explanation:

Let x represent the score on the 1st round.

Then x + 2 is the score on the 2nd round

And (x + 2) + 2 is the score on the 3rd round.

The total of the 3 rounds is 216.

x + (x + 2) + (x + 4) = 216

                  3x + 6 = 216

                  3x       = 210

                    x       = 70

1st round score (x): 70

2nd round score (x + 2): 72

3rd round score (x + 4): 74