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26 December, 17:54

The sum of two numbers is 28. The first number, x, is three

times the second number, y.

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Answers (1)
  1. 26 December, 21:09
    0
    x=21

    y = 7

    Step-by-step explanation:

    x+y = 28

    x = 3y

    Substitute the second equation into the first

    3y+y = 28

    4y = 28

    Divide by 4

    4y/4 = 28/4

    y = 7

    Now we need to find x

    x = 3*y

    x = 3*7

    x = 21
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