SOLUTION: After five games of bowling, Ralphs average score was 91. After six games his average score was 89. What was his score in the sixth game ?

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Question 929006: After five games of bowling, Ralphs average score was 91. After six games his average score was 89. What was his score in the sixth game ?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x = sum of first five games' scores
y = score on sixth game
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x/5 = 91
x = 91*5
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(x + y)/6 = 89
x + y = 89*6
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x + y = 89*6
91*5 + y = 89*6
y = 89*6 - 91*5
y = 79
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answer:
y = score on sixth game = 79
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