Math

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5x-6 = 2x+12

It says x=3 but I don't understand how, can you you explain the steps for me?

  • Math -

    5x-6 = 2x+12

    Combine like terms. Subtract 2x from both sides of the equation.

    5x - 2x - 6 = 12

    3x - 6 = 12

    Add 6 to both sides.

    3x = 12 + 6

    3x = 18

    Divide both sides by 3.

    x = 18/3

    x = 6

    ___________________________

    It looks like x does not equal 3. Let's try substituting 3 for x.

    5x-6 = 2x+12

    (5 * 3) - 6 = (2 * 3) + 12

    15 - 6 = 6 + 12

    Nope! 3 doesn't work.

  • Math -

    5x-6=2x+12

    You subtract 12 on both sides of the equal sign
    Then you get 5x-18=2x
    Subtract 5x on both sides
    -18=-3x
    Divide by -3 both sides
    You get x=6

  • Math -

    Thank You That Is What I Got Also, But The Workbook Said x equaled 3

  • Math -

    Im sorry but the books wrong

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