2 numbers that are equal have a sum of 60

Discussion in 'Calculator Requests' started by math_celebrity, Oct 18, 2021.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    2 numbers that are equal have a sum of 60

    Let's choose 2 arbitrary variables for the 2 numbers
    x, y

    Were given 2 equations:
    1. x = y <-- Because we have the phrase that are equal
    2. x + y = 60
    Because x = y in equation (1), we can substitute equation (1) into equation (2) for x:
    y + y = 60

    Add like terms to get:
    2y = 60

    Divide each side by 2:
    2y/2 = 60/2

    Cancel the 2's and we get:
    y = 30

    Since x = y, x = y = 30
    x = 30
     

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