the average of eighty-five and a number m is ninety

Discussion in 'Calculator Requests' started by math_celebrity, Dec 3, 2021.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    the average of eighty-five and a number m is ninety

    Average of 2 numbers means we add both numbers and divide by 2:
    (85 + m)/2 = 90

    Cross multiply:
    m + 85 = 90 * 2
    m + 85 = 180

    To solve this equation for m, we type it in our math engine and we get:
    m = 95
     

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