Respostas

2013-10-25T07:38:23-02:00
10 + ( x - 2) = 5 - ( x + 4)
10 + x - 2 = 5 - x - 4
x + x = 5 - 4 + 2
2x = 7 - 4
2x = 3
x = 3/2
2013-10-25T07:58:30-02:00
10 +(x-2)=5-(x+4)
10x+ 8=-5x+9
10x +5x=9-8
15x=1
x=1/15