Respostas

2013-09-04T17:21:03-03:00
7x = 9 - 3(x+1)
7x = 9 - 3x -3
7x + 3x = 9 - 3
10x = 6
x = 6/10 = 3/5.O inverso de x é: 5/3
4 5 4
2013-09-04T17:25:09-03:00
Calculando x, temos:

7x=9-3(x+1)\\\\
7x=9-3x-3\\\\
7x+3x=9-3\\\\
10x=6\\\\
x=\dfrac{6}{10}\\\\
x=\dfrac{3}{5}\\\\

Calculando seu inverso, obtemos:

\boxed{\dfrac{5}{3}}
1 5 1