SOLUTION: Kevin will take 4 math tests this term. All of the tests are worth the same number of points. After taking the first 3 tests, his mean test score is 88 points. How many points does

Question 928157: Kevin will take 4 math tests this term. All of the tests are worth the same number of points. After taking the first 3 tests, his mean test score is 88 points. How many points does he need on his last test to raise his mean test score to 90 points?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = score he needs on the fourth test
y = sum of scores of the first three tests
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y/3 = 88
y = 3*88
y = 264
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(264 + x)/4 = 90
264 + x = 90*4
x = 90*4 - 264
x = 96
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answer:
x = score he needs on the fourth test = 96
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