Math

Whenever you cross multiply, which side do you start with first? Do i start on the left or right?

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  1. Left or right does not really matter. What is important is where the unknown is located.

    A rule of thumb is to multiply together the two numbers beside the unknown, and divide by the one across.

    If a,b,c are known, and D is not known, and the equation looks like:
    a c
    -=-
    b D
    then you could write

    D=c×b÷a

    or for
    a b
    -=-
    D c
    then
    D=a×c÷b

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  2. thankyou!

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  3. You're welcome!

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  4. The angryro

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