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Math Help - formulae

  1. #1
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    formulae

    how do you do formulae?

    for example it says make x the subject and the formulae is like:

    2=y-4x

    i get really confused with questions like that
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  2. #2
    Air
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    Quote Originally Posted by Blademaster View Post
    how do you do formulae?

    for example it says make x the subject and the formulae is like:

    2=y-4x

    i get really confused with questions like that
    Do it step by step.

    2 = y - 4x

    Take the other variable to one side so you only have the variable that you want to make the subject on one side. In this case y is the other variable so we'll move it to the LHS.

    2-y=-4x

    Divide by the number in front of the variable that you want to make the subject. In this case -4.

    -\frac{2-y}{4} = x
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  3. #3
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    could you maybe do a few more examples to explain it?
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  4. #4
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    Quote Originally Posted by Blademaster View Post
    could you maybe do a few more examples to explain it?

    http://www.purplemath.com/modules/solvelit.htm
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