Respuestas

2013-04-06T18:59:15+02:00

4x+x=23-3       6(x-1)=2(9+x)

5x=20               6x-6= 18+2x

x=20/5              6x-2x=18+6

x=4                   4x=24

                           x=24/4

                           x=6