Respostas

2014-03-18T01:06:10-03:00
7-6=15x-x
1=14x
1/14=x ou x=1/14 ou x=0,071428
2014-03-18T01:08:10-03:00
X – 6  = 3 obtemos assim .... x/5x=3.6.7 = 5x=126 = x=126/5=> x= 25,2
5x – 7