Respostas

  • Usuário do Brainly
2013-10-01T00:43:49-03:00
A) x + 4x - 4 = 9 - 2x - 6
5x + 2x = 3 + 4
7x = 7
x = 7/7
x = 1

b) 5x - 2x + 1 = 2 - 3x - 15
3x + 3x = - 13 - 1
6x = - 14
x = - 14/6 :(2)
x = - 7 / 3

c) 10 - 2x - 1 = 12x + 6
- 2x - 12x = 6 - 9
- 14x = - 3 :(-1)
14x = 3
x = 3/14