2consecutiveevenintegerssuchthatthesmalleraddedto5timesthelargergivesasumof70

Discussion in 'Calculator Requests' started by math_celebrity, Jul 14, 2019.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    2 consecutive even integers such that the smaller added to 5 times the larger gives a sum of 70.

    Let the first, smaller integer be x. And the second larger integer be y. Since they are both even, we have:
    1. x = y - 2 <-- Since they're consecutive even integers
    2. x + 5y = 70 <-- Smaller added to 5 times the larger gives a sum of 70
    Substitute (1) into (2):
    (y - 2) + 5y = 70

    Group like terms:
    (1 + 5)y - 2 = 70
    6y - 2 = 70

    Typing 6y - 2 = 70 into our search engine, we get:
    y = 12 <-- Larger integer

    Plugging this into Equation (1) we get:
    x = 12 - 2
    x = 10 <-- Smaller Integer

    So (x, y) = (10, 12)
     

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