MÉTODO DE  IGUALACIÓN

2X - 3Y = 7

3X + 9Y = -3               X =  7+3Y  

                                              2

                                     X = -3-9Y

                                               3

7+3Y    =  -3-9Y

  2                 3

-6-18Y = 21+9Y

   6              6                                                      X = 7+3(-1)

                                                                                       2

-18Y - 9Y = 21 + 6                                                  X= 2

-27Y  = 27

  Y= 27                  

       -27        

Y= -1

3X+2Y = 7                                X = 7-2Y

4X -3Y = -2                                        3

  

                                                     X = -2+3Y

                                                                 4                                                                 

 X = 7-2Y                   X = -2+3Y

               3                        4                                                                

 

              28-8Y = -6+9Y                                          X = 7-2*2

                                                                                         3

                                                                                                 X = 1

-8Y -9Y =  -28 - 6

 -  17Y     = 34

      Y =- 34

             -17

Y = 2

MÉTODO DE REDUCCIÓN

Y = 3

X = 2