The equations are

                    Equation (1)

                 Equation (2)

 Multiply the first equation by 2 and the second equation by 3.

Then subtract the equations to eliminate the c variable.

     (Apply Add the corresponding columns)

                         (Divide each side by negative 32)

                            (Cancel common terms)

                                 (Divide: )

 Substitute in equation (2).

                 (Multiply: )

(Add 18 to each side)

           (Apply Additive inverse property: )

                 (Apply Additive identity property: )

                         (Add: )

                           (Divide each side by 2)

                         (Cancel common terms)

                             (Divide: )

The solution is  

The solution is .