extra help please?

How do you cross multiply 

4c + 12 = 3d + 9

9 Answers

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  • sepia
    Lv 7
    1 month ago

    4c + 12 = 3d + 9

    This being an equation, 

    no cross multiplication is involved.

    Factorizing gives us

    4(c + 12) = 3(d + 3)

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  • David
    Lv 7
    1 month ago

     You can factorize it into: 4(c+3) = 3(d+3)

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  • Anonymous
    1 month ago

    The equation has already been cross-multiplied...

    4c + 12 = 3d + 9 ==> 4(c + 3) = 3(d + 3). 

    The original equation (before cross-multiplication) would be: (c + 3)/3 = (d + 3)/4. 

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  • Anonymous
    1 month ago

    Simplify the equation: 4(c +3) = 3(d+3)

    Now try.

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  • Elaine
    Lv 7
    1 month ago

    Are you trying to rewrite one variable in terms of the other?

    4c = 3d + 9 - 12

    4c = 3d - 3

    c = 3d - 3/4

    OR

    4c + 12 - 9 = 3d

    4c + 3 = 3d

    4c/3 + 3/3 = d

    4c/3 + 1 = d 

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  • 1 month ago

    I never cross multiply, it's too confusing! But you can simplify.

    4(c +3) = 3(d+3)

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  • 1 month ago

    (4c + 12)/1 = (3d + 9)/1

    (4c + 12) × 1 = (3d + 9) × 1

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  • 1 month ago

    You can’t. You need fractions to cross multiply. 

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  • Anonymous
    1 month ago

    What are you trying to do?

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