Saturday, December 5, 2009

Please tell me how to work this problem: 5p +9C = p, for C?

I need help with this algebrae problem - my 7th grade daughter can't understand how to do it, and neither do i!Please tell me how to work this problem: 5p +9C = p, for C?
5p + 9C = p





9C = p - 5p





9C = -4p





C = -(4p)/9Please tell me how to work this problem: 5p +9C = p, for C?
You would want to solve for C.





To do that you start with the original:


5p + 9C = p





Then you subtract 5p from either side.


5p - 5p + 9C = p - 5p


9C = -4p





Then divide by 9.





C = -4/9p





I assume that is what the teacher wants your daughter to do. In this kind of equation you arent looking for a numerical value. I believe that is what you are suppose to do.
5p + 9c = p


9c = p - 5p


9c = -4p


c = -4p/9
subtract pfrom both sides of equations to get


4p+9c=0


subtract 4p from both sides


9c=-4p


divide by 9


c=-4p/9
5p + 9C = p


9C = p - 5p


9C = -4p


C = -4p/9
5p + 9c = p


-5p -5p subtract 5 from both sides





9c = -4p divide by nine both sides


/9 /9





c = -4/9 p %26lt;----------answer

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