SOLUTION: If the average score of 3 matches is 4 what must be score of the 4th game to bring the average to 5?

SOLUTION: If the average score of 3 matches is 4 what must be score of the 4th game to bring the average to 5?

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Question 1089400: If the average score of 3 matches is 4 what must be score of the 4th game to bring the average to 5?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

So then,

Adding D,

Substituting,

Solve for .

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