SOLUTION: You take 4 tests and your score goes up 3 points each time you take one. If you got an 82 your first test, what was your average number of points per test?

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Question 1054522: You take 4 tests and your score goes up 3 points each time you take one. If you got an 82 your first test, what was your average number of points per test?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
First test : X
Second test : X%2B3
Third test : X%2B3%2B3=X%2B6
Fourth test :+X%2B6%2B3=X%2B9
So then the average would be,
A=%28X%2BX%2B3%2BX%2B6%2BX%2B9%29%2F4=%284X%2B18%29%2F4=X%2B18%2F4=X%2B9%2F2
Substituting,
A=82%2B9%2F2
A=86.5