Together, Mary Sue and Betty have 603 necklaces, although Mary Sue has 115 more necklaces than Betty. How many necklaces does Betty have?

Question

I need the answer and fast. Also, i dont know how to solve. PLease show steps

Answer 1

1.  Let  m  represent the number of necklaces that Mary Sue has.

2.  Let  b  represent the number of necklaces that Betty has.

3.  The sentence portion "Together [addition, or plus], Mary Sue and Betty have 603 necklaces..." can be translated into a mathematical equation like:  m + b = 603.

4.  The sentence portion "... although Mary Sue has 115 more [155+] than Betty." can be translated into a mathematical equation like:   m  =  115 + b.

 

5.  If you substitute in the right side of the second equation for the  m  in the first equation, you can solve for  b  , the number of necklaces that Betty has.