amys bowling score in her 3rd game was 10 less that her score in her first game and 5 more than her second game. The total points of all 3 games were 275. What is the highest number of points she could have scored in her first game?

Answer 1

Let s be the score of the 3rd game
s+10 was 1st game
s-5 was 2nd game

s+10 + s-5 + s = 275
3s + 5 = 275
3s = 270
s = 90
n
So, the 3 games were 100 85 90

Don't know why the "highest number" question was asked. The answer is exact.

If they had said "at least 275" or "at most 275" then there would have been an inequality.