One number is 8 times another number. The numbers are both positive and have a difference of 70.

Discussion in 'Calculator Requests' started by math_celebrity, Jun 21, 2019.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    One number is 8 times another number. The numbers are both positive and have a difference of 70.

    Let the first number be x, the second number be y. We're given:
    1. x = 8y
    2. x - y = 70
    Substitute(1) into (2)
    8y - y = 70

    Plugging this equation into our search engine, we get:
    y = 10 <-- This is the smaller number

    Plug this into Equation (1), we get:
    x = 8(10)
    x = 80 <-- This is the larger number
     

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