(adsbygoogle = window.adsbygoogle || []).push({}); fractions -- showing that they are equivalent

I have the fraction:

a = c/d * b

And from that I want to show that:

a = c/(c+d) * (a+b)

At least the two equations should be equivalent if I did everything right. How do I go from first to the second?

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# Homework Help: Fractions - showing that they are equivalent

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