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Math Help - Solving for Specified Variable

  1. #1
    mgarcia85
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    Solving for Specified Variable

    D=1/2GR Solving for G

    What i do not understand is why do you multiply each side by 2? Is it because that is the denominator? Also, when you do this it comes out to 2D/R=1G, so because its 1G then its just G correct? So the answer is 2D/R=G?

    Now lets say the problem was different.
    D=3/4GR Would it be
    (4)D=4(3/4)GR
    4D=3G (move the r to the other side)
    4D/R=3G Would that be correct? Im new to this stuff so just trying to understand how it works, would that 3 be correct beside the G? Doesn`t seem right.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by mgarcia85 View Post
    D=1/2GR Solving for G

    What i do not understand is why do you multiply each side by 2? Is it because that is the denominator? Also, when you do this it comes out to 2D/R=1G, so because its 1G then its just G correct? So the answer is 2D/R=G?

    Now lets say the problem was different.
    D=3/4GR Would it be
    (4)D=4(3/4)GR
    4D=3G (move the r to the other side)
    4D/R=3G Would that be correct? Im new to this stuff so just trying to understand how it works, would that 3 be correct beside the G? Doesn`t seem right.
    Everything you are asking about is correct except for that you aren't done with your last equation.
    4D/R =3G

    Divide both sides by 3:
    (4D/R)/3 = (3G)/3

    (4D)/(3R) = G

    -Dan
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