Respostas

2013-11-28T23:53:32-02:00
4x-18 =10
4x = -10 +18
4x = 8
x = 8/4
x = 2
1 5 1
2013-11-29T00:00:54-02:00
4x-18=-10
4x
4x=-10+18
4x=-28
x=28 / 4
x=-7
     
1 2 1