Respostas

2014-08-07T10:55:47-03:00
3x+7=x+3
3x-x=3-7
2x=-4
x=-4/2
x=-2
1 5 1
https://www.facebook.com/matematicadesafios
2014-08-07T10:58:04-03:00
3x+7= x+3
3x-x = 3-7
2x= -4
x= -4/2
x= -2