Math (Algebra 1)

Juan’s first 3 exam scores are 85, 93, and 87. What does he need to score on his next exam to average 90 for all 4 exams?

let x represent the score on his next exam

(put this in a multi-step equation)

PLEASE HELP

asked by Nicole
  1. an average of 90 on 4 exams means 4*90=360 points in all.

    So, how many points shy of 360 is the sum of the first three tests?

    posted by Steve
  2. 95

    posted by Josie

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