Respostas

2013-10-20T08:47:50-02:00
4x-7+x=1
4x +x =1 +7 
5x=8
x =8/5 
espero ter ajudado
2 1 2
4x-7+x=1
4x +x =1 +7
5x=8
x =8/5
x = 8/5 ou 1,6
2013-10-20T14:04:12-02:00
4x + x = 1 + 7 
5x = 8
 x = 8/5