in a class of 37 students,the number of students who like martial art only is double than the number of students who like athletics only .if

Question

in a class of 37 students,the number of students who like martial art only is double than the number of students who like athletics only .if students like both 4 like none of the games . find how many students like​

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Dâu 1 month 2021-08-15T21:25:35+00:00 1 Answers 0 views 0

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    2021-08-15T21:26:59+00:00

    Answer:

    number of students who like Athletics only = x = 10 students

    number of students who like marshal arts only = 2x = 20 students

    Step-by-step explanation:

    In a class of 37 students, the number of students who like marshal arts only is

    double than the number of students who like athletics only. If 3 students like both

    and 4 like none of the games, find out how many students like:

    i. Marshal arts

    ii. Athletics​

    Total students in the class = 37

    number of students who like Athletics only = x

    number of students who like marshal arts only = 2x

    Number of students who like both = 3

    Number of students who like none = 4

    Total = athletics + marshal art + both + none

    37 = x + 2x + 3 + 4

    37 = 3x + 7

    37 – 7 = 3x

    30 = 3x

    x = 30/3

    x = 10

    number of students who like Athletics only = x = 10 students

    number of students who like marshal arts only = 2x

    = 2(10)

    = 20 students

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )