Twenty-five is nine more than four times a number

Discussion in 'Calculator Requests' started by math_celebrity, Jan 18, 2024.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    The phrase a number means an arbitrary variable. We can pick any letter a-z except for i and e.

    Let's choose x.

    Four times a number:

    nine more than four times a numbrer
    4x + 9

    The phrase is means equal to. We set 4x + 9 equal to 25 as our algebraic expression:
    4x + 9 = 25

    If the problem asks you to solve for x, we type it in our math solver and get:
    x = 4

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