1. Simplify

 

(a((d-b)/(a-c))+b)/(c((d-b)/(a-c))+d)

 

We have an addition of fractions problem on both the top and

bottom. For this we will need common denominators.

 

 

Remove parentheses

 

 

Now that we have common denominators, we can add the fractions

on both the top and bottom.

 

 

We see that some of the terms on the tops will cancel out.

 

 

 

and we don't even need to invert and multiply so see that the

expression simplifies to

 

= 1

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