Respostas

2013-08-14T23:02:49-03:00
X+x-4=17-2x+1
2x-4=17-2x+1
2x+2x=17+1+4
4x=22
x=22/4
x=5,5
26 4 26
2013-08-14T23:03:42-03:00
X + x -4 = 17 - 2x +1 
2 x -4 = -2x +18 
2x + 2x = 18 + 4 
4x = 22 
x = 22/4 
 x = 11/2 = 5,5 
11 4 11