Respuestas

2012-10-19T09:58:06+02:00

3x+2y=9.5

3x=9.5-2y

x=9.5/3-(2/3)y

x=3.16-(2/3)y

 

x+y=4

x=4-y

 

3.16-2/3y=4-y

3.16-4=-y+(2/3)y

-0.84=-0.33y

(-0.84)/(-0.33)=y

2.55=y

 

 

x+y=4

x+2.55=4

x=4-2.55

x=1.45