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3 September, 14:49

One number added to three another number is 24. Five times the first number added to three times the other number is 36. Find the number.

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Answers (2)
  1. 3 September, 14:51
    0
    First number = 3.

    The other number = 7.

    Step-by-step explanation:

    I am assuming you mean 'one number added to three times another number is 24'. Let the 2 numbers be x and y.

    We have the following system of equations:

    x + 3y = 24

    5x + 3y = 36

    Subtracting the 2 equations (the second minus the first):

    4x = 12

    x = 3

    Substituting x = 3 in the first equation:

    3 + 3y = 24

    3y = 24 - 3

    3y = 21

    y = 7.
  2. 3 September, 14:59
    0
    Step-by-step explanation:

    x + 3y = 24

    5x + 3y = 36

    Like you said, BUT

    if you were to subtract the equations

    x - 5x = - 4x

    Then the 3ys would cancel out. Leaving:

    -4x = 12

    x would equal - 3
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