Respostas

2013-11-05T21:32:01-02:00
7x-[5x+3-(2x+1)-10]=-(-x+3)
7x-[5x+3-2x-1-10]=+x-3
7x-[+3x-8]=+x-3
7x-3x+8=+x-3
7x-3x-x=-8-3
3x=-11
x=-11/3
2 4 2