math

there are 50 question in a test. a student gains 2 marks for a correct anwser and loses 1 mark otherwise. if a student has 76 marks, how many question did he answer incorrectly?

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  1. This is fairly easy just use alittle more effort and someone will check your answer.

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    posted by Jon
  2. i = # incorrect (or otherwise) answers
    c = # correct answers
    ========================
    i + c = 50
    -1 + 2c = 76
    ================
    Solve the two equations simultaneously.
    Post your work if you get stuck.

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  3. Check my thinking. Check my work.

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