Respuestas

2012-10-23T00:10:50+02:00

-(3x-8y-2z)+7x+3y+z)=


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


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


4x+11y+3z


listo.

2012-10-23T00:13:18+02:00

(3x-8y-2z)+7x+3y+z

3x+8y+2z+7x+3y+z

3x+7x+3y+8y+2z+z

4x+11y+3z