Respuestas

2013-08-31T01:54:57+02:00
Resolucion 4
12z + 20 = -10z - 8 -2z
24z= -28
z = -4/3
resolucion 3
10x/7 + 8/7 = 3x/2 -3
10x/7-3x/2= 8/7-3/1
(20x-21x)14 =(8-21)/7
-7x=-182
x=26

resolucion 2
(3x-12)/4 = (10x-15)/3
9x-36= 40x - 60
24= 31x
x= 24/31

resolucion 1
12a -84= 18a +90 -42a+6
36a =180
a=5