SOLUTION: If a student missed 4 problems on a test and received a grade of 89% and all the problems were equal the same value, how many questions were on the test

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Question 622921: If a student missed 4 problems on a test and received a grade of 89% and all the problems were equal the same value, how many questions were on the test
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
If a student missed 4 problems on a test and received a grade of 89% and all the problems were equal the same value, how many questions were on the test
.
Let x = total number of questions
then
(x-4)/x = .89
x-4 = .89x
x = .89x + 4
.11x = 4
x = 4/.11
x = 36.36
or, rounding
x = 36 questions