Asked by Anonymous

a test 50 problems on it. for every correct answer, 2 points are given. for each incorrect answer, 1 point is subtracted. sue scored 85 points. how many problems did she miss?
Answered by Steve
assuming she answered all the questions, and got x wrong, then there were (50-x) correct.

2(50-x) - x = 85

Now just find x.
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