Respostas

2014-07-30T18:27:59-03:00
Olá, Vanessa2406!

7x + 3 = 1
7x = 1 - 3
7x = -2
x = -2/7
2014-07-30T18:29:52-03:00
7x + 3= 1
7x= 1-3
7x= -2
x=  - 2/7