Respostas

2014-08-18T23:30:57-03:00
7x-2=7
7x=7+2
7x=9
Passa o 7 dividindo
x=9/7 (resposta)
2014-08-18T23:45:01-03:00
7x - 2 = 7

7x = 7 + 2

7x = 9

x = 9/7 ou 1,28 .