Respuestas

2013-07-16T00:49:43+02:00
I) seria : 
 (15x-4 / 3) - (12x-2 / 4) = (18x-5 / 3) + 1
60x-16 - 36x-6 = 18x-5+3 / 3
24x-22 = 18x-2 / 3
72x-66 = 18x-2
90x = 68
X=68/90
respuesta: X=34/45
2013-07-16T03:09:24+02:00
(5*-4/3)-(3*-2/4)ç=86*-5/3)+1
(15x-4 / 3) - (12x-2 / 4) = (18x-5 / 3) + 160x-16 - 36x-6 = 18x-5+3 / 324x-22 = 18x-2 / 372x-66 = 18x-290x = 68X=68/90respuesta: X=34/45