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Math Help - Transposing by cross multiplying help needed

  1. #1
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    Transposing by cross multiplying help needed

    Problem is

    Step 1. 6/4 = 2/N-3

    Step 2. 6 x (N-3) = 4 x 2

    Step 3. 6N - 18 = 8

    Step 4. 6N = 8 + 18

    Divide both sides by 6

    N = 26/6

    = 4.3v

    Can anyone tell me how they came from getting Step 3 out of Step 2?

    Thank You!
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  2. #2
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    Re: Transposing by cross multiplying help needed

    Quote Originally Posted by cliffgnome View Post
    Problem is

    Step 1. 6/4 = 2/N-3

    Step 2. 6 x (N-3) = 4 x 2

    Step 3. 6N - 18 = 8

    Step 4. 6N = 8 + 18

    Divide both sides by 6

    N = 26/6

    = 4.3v

    Can anyone tell me how they came from getting Step 3 out of Step 2?

    Thank You!
    Expanding the brackets.
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