Respuestas

2013-10-16T01:03:35+02:00
D)4x+3=3+2x                                               e)   5x-6=12-2x
2x=-3+3                                                         7x=18 
x=0                                                                    x=18/7

f)6x+3=2x+2
4x=-1
X= -1/4