Respostas

2013-05-11T10:12:10-03:00

2x-5x+y+y+3-1 = -3x+2y+2

 

2y = -3x+2

 

-3x-3x+2+2= -6x+6 \ -6x= 4 x= 6+4 = x= 10

 

y=-58/2= -

 

x=-58

y=-29

 

 

5 2 5
2013-05-11T13:48:52-03:00

 

(2x+y+3)+(-5x+y-1)

 

2x – 5x  +  y + y + 3 – 1 =  - 3x +2y + 2.

4 4 4