Respuestas

2012-11-15T03:30:43+01:00

-2+y=8

y=8 + 2

y=10

 

2x=7=-2y  ---> No me acuerdo bro.

2012-11-15T03:44:28+01:00

-2x+y=8   2x+7=-2y                       2x+y=8

x=8-y/-2  x=-2y-7/2                     2x=8-5

8-y=-2y-7                                     2x=3

-y+-2y=-7-8                                   x=3/2

-3y=-15                                           x=0.75

y=-15/3

y=5

 

espero que t sirva