SOLUTION: if you have a mean of 84 on a test and three of the scores are 84, 88, and 80 what is the fourth score

Question 743990: if you have a mean of 84 on a test and three of the scores are 84, 88, and 80 what is the fourth score
Found 2 solutions by checkley79, tommyt3rd:
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
(84+88+80+X)/4=84
(252+X)/4=84
252+X=4*84
252+X=336
X=336-252
X=84 IS REQUIRED ON THE 4TH. TEST TO AVERAGE 84.
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
Let's call the unknown value x...

This is our working equation...

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