Respostas

2014-04-23T18:30:04-03:00
2x-4= -x+5
2x+x = +4+5
3x= 9
x= 9/3
x=3
resposta x=3
2014-04-23T18:30:29-03:00
2x - 4 = - x + 5
2x + x = 5 + 4
3x = 9
x = 9 ÷ 3
x = 3

Resposta: 3