SOLUTION: if you have test scores of 75, 82, and 91 what would the fourth test have to be to get an 80 as your average

Question 827392: if you have test scores of 75, 82, and 91 what would the fourth test have to be to get an 80 as your average
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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(75 + 82 + 91 + x)/4 = 80
248 + x = 80*4
x = 80*4 - 248
x = 72
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