Respostas

2013-10-28T20:12:40-02:00
4x - 1/3x = 187

4x/1 - 1x/3 = 187/1

(4x/1)/3 - (1x/3)/1 = (187/1)/3

12x -x = 561

11x = 561

x= 561/11

x= 51

Agora,a prova dos 9

51.4 - 51/3= 187

204 - 17 = 187 (ok)
2013-10-28T20:38:09-02:00
4x - 1/3x = 187

4x/1 - 1x/3 = 187/1

(4x/1)/3 - (1x/3)/1 = (187/1)/3

12x -x = 561

11x = 561

x= 561/11

x= 51

Agora,a prova dos 9

51.4 - 51/3= 187

204 - 17 = 187