Respuestas

2012-08-12T05:03:17+02:00

(5-3x)-(-4x+6)=(8x+11)-(3x+6)

5-3x+4x-6=8x+11-3x-6

-3x+4x-8x+3x=11-6-5+6

-4x=6/*-1

4x=-6

x=-6/4            x=-3/2



16n -[3n¨-(6-9n)]=20n+[-(3n+2)-(n+3)]


16 -(3n-6+9)= 20n + (-3n-2-n-3)

16-3n+6-9= 20n + (-3n)-2-n-3

-3n-20n+3n+n= -2-3-16-6+9

-19n=  -18   /*-1

19n=18

n=18/19