sum of a number and 7 is subtracted from 15 the result is 6.

Discussion in 'Calculator Requests' started by math_celebrity, Nov 19, 2018.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    Sum of a number and 7 is subtracted from 15 the result is 6.

    The phrase a number means an arbitrary variable, let's call it x.

    We take this expression in pieces. Sum of a number and 7
    x + 7

    Subtracted from 15
    15 - (x + 7)

    The result is means an equation, so we set this expression above equal to 6
    15 - (x + 7) = 6 <-- This is our algebraic expression

    If the problem asks you to solve for x, we Group like terms
    15 - x - 7 = 6
    8 - x = 6

    Type 8 - x = 6 into the search engine, and we get x = 2
     

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