Respostas

2014-06-20T00:04:40-03:00
18x-43=65
23x-16=14-17x
10y-5(1+y)=3(2y-2)-20
(x-5)/10+(1-2x)/5=(3x)/4
2014-06-20T00:05:19-03:00
1º GRAU:x+8=9
2x-8=3x-10
2º grau
2x^2+2x+6=0
x^2-2x-3=0