SOLUTION: Mariana averaged 83 on her first three history exams . The first score was 90. The second score was 3 less that then third score. What did she score on the second and third exams ?

Question 1037987: Mariana averaged 83 on her first three history exams . The first score was 90. The second score was 3 less that then third score. What did she score on the second and third exams ?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
So the average was,

and

Substituting,

So then,

So her test scores are 90,78, and 81.

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