Mathematics, 31.08.2019 04:40 daosau377

In a math contest consisting of 30 problems, lydia was awarded 12 points for each correct answer, and 7 points were subtracted from her score for each wrong answer. no points were awarded or subtracted for problems not answered. how many correct answers did lydia have if her score was 209?

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In a math contest consisting of 30 problems, lydia was awarded 12 points for each correct answer, an...