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Math

There are 40 questions on a class test. Six points are given for each correct answer and three points are deducted for each wrong answer. Find the number of correct answers for a test score of 105.

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  1. correct --- x
    incorrect --- 40-x

    6x - 3(40-x) = 105
    6x - 120 + 3x = 105
    9x = 225
    x = 25

    25 correct , 15 wrong

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  2. 5-2(12-5)=39
    5-24+2=39
    7=63
    9
    I Need to know am I right

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  3. correct --> x
    incorrect --> 40 - x

    6x - 3(40 - x) = 105
    6x - 120 + 3x = 105
    9x = 225
    x = 25

    There are 25 questions correct, and there are 15 questions incorrect due to 40 - 25 being 15. It's math, so respect it.

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