mark has an average of 88 on three math tests. if his test score was 13 point higher than the 2nd, and the third was 5 points more than the 2nd,find his 3 score

Question

translate the given information into a system of equations and solve it.

Answer 1

let x=second score

x+13=first score

x+5=third score

(x+x+13+x+5)/3=88

3x+18=3*88

3x+18=264

3x=264-18

3x=246

x=246/3

x=82

x+13=95 

x+5=87 answer

 

Answer 2

You say, "if his test score was 13 points higher than the 2nd".  Which test score is 13 points higher than the 2nd?  Is it the first test score or the third test score.