Respostas

2014-05-26T13:59:20-03:00
3x_2/5-x_1/4=0
3x_0;4-x+0,25=0
2x=0,65
x=0,325

[4 (3x+2)-[-5(x+2)]=0
[12x+8]-[5x-5]=0
12x8 -5x+5 =0
7x13=0
7x=-13
x=13/7