Respuesta :

tramserran

Answer: white = $13, double = $14

Step-by-step explanation:

Let white chocolate chip dough = x

Let double chocolate chip dough = y

Mary:      3x + 2y = 67

Darryl:   -(3x + 4y = 95)

                     -2y = -28

                  ÷-2    ÷-2  

                        y = 14

3x + 2y = 67

3x + 2(14) = 67

3x + 28 = 67

      -28  -28

3x         = 39  

÷3           ÷3  

 x         = 13