The shoe store has twice as many shoes as it does brown shoes. The total number of shoes is 66. How many black shoes are there?

Question

The shoe store has twice as many shoes as it does brown shoes.  The total number of shoes is 66.  How many black shoes are there?

Answer 1

Assuming you meant twice as many BLACK as BROWN, we can note that:

 

Black = 2*Brown, and that Black+Brown=66

 

Substituting the first equation into the second yields:

 

Black+Brown= 2*Brown+Brown=66

 

So 3*Brown=66 and Brown=22.

 

Plugging back into either equation will yield Black=44.