Respostas

2014-06-20T17:10:56-03:00
2x-15=36
2x=36+15
2x=51
x=51/2

O / nesse caso,representa fração
1 3 1
2014-06-20T17:15:44-03:00
2x=15+36
2x=51
x=51/2
x=25.5
1 3 1