the sum of a number and itself is 8

Discussion in 'Calculator Requests' started by math_celebrity, Nov 2, 2016.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    A number means an arbitrary variable, let's call it x.

    The sum of a number and itself means adding the number to itself
    x + x

    Simplified, we have 2x

    The word is means equal to, so we have an algebraic expression of:
    2x= 8

    IF you need to solve this equation, divide each side by 2
    x = 4

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