Respuestas

2012-03-28T18:22:16+02:00

5x/6-3y/7=2 |*42

x/2-y/7=2 |*14

 

35x-18y=84

7x-2y=28 |*(-9)

 

35x-18y=84

-63x+18y=-252

------------------

-28x=-168

x=6

 

7*6-2y=28

42-2y=68

2y=-26

y=-13