Math

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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.

  • Math -

    correct --- x
    incorrect --- 40-x

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

    25 correct , 15 wrong

  • Math -

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

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