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Christina
Lv 4
Christina asked in Education & ReferenceHomework Help · 9 years ago

Multiplying both sides of equation problem?

(C/9) = 405

C equals ??

Update:

Here are the options I have to choose. I chose None of the Above but was still marked as wrong.

30

35

40

54

None of the above

5 Answers

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  • G K
    Lv 6
    9 years ago
    Favorite Answer

    Malevolence and Coronodo are correct.

    If you're still getting "Wrong" for "None of the above," there must be a misprint in the equation, or the answer key, or the computer program.

    If the equation is supposed to be

    9c = 405

    you would divide both sides by 9 and get

    C=45

    and that's not there either.

    So, something is messed up!

    That's why we hate multiple choice questions in math.

  • Conrado
    9 years ago

    C=3645

    (C/9)(405/1)

    All whole numbers can be put over one and it doesn't affect the numerical value. You cross multiply. C*1 would equal C. Then 9*405 equals 3645. So thats how you get C=3645 then you enter the number into the equation and check your work.

    3645/9=405

  • Faufab
    9 years ago

    Multiply by 9 on both side

  • Malevolence
    Lv 5
    9 years ago

    Multiply 9 on both sides and youll get c = 3645.

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  • ?
    9 years ago

    1. Get rid of paranthesis. Subtract nine on both sides and you got your answer

    Source(s): Algebra class
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