2 times the sum of a number and 3 is equal to 3x plus 4

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

  1. math_celebrity

    math_celebrity Administrator Staff Member

    2 times the sum of a number and 3 is equal to 3x plus 4

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

    The sum of a number and 3 means we add 3 to x:
    x + 3

    2 times this sum means we multiply the quantity x + 3 by 2
    2(x + 3)

    3x plus 4 means 3x + 4 since the word plus means we use a (+) sign
    3x + 4

    The phrase is equal to means an equation, where we set 2(x + 3) equal to 3x + 4
    2(x + 3) = 3x + 4
     

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