There are two numbers. The sum of 4 times the first number and 3 times the second number is 24. The

Discussion in 'Calculator Requests' started by math_celebrity, Jan 7, 2019.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    There are two numbers. The sum of 4 times the first number and 3 times the second number is 24. The difference between 2 times the first number and 3 times the second number is 24. Find the two numbers.

    Let the first number be x and the second number be y. We have 2 equations:
    1. 4x + 3y = 24
    2. 2x - 3y = 24
    Without doing anything else, we can add the 2 equations together to eliminate the y term:
    (4x + 2x) + (3y - 3y) = (24 + 24)
    6x = 48

    Divide each side by 6:
    x = 8

    Substitute this into equation (1)
    4(8) + 3y = 24
    32 + 3y = 24

    Type 32 + 3y = 24 into our search engine and we get y = 2.6667.
     

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