Respostas

2014-08-19T20:36:39-03:00
X/10+x/7-x/4=-1 m.m.c
10,7,4|2
5,7,2|5
1,7,2|2
1,7,1|7
1,1,1| 7*2*5*2=140
14x+20x-35x=-1
69x=-1
x=69/-1

acho que e isso!