Respostas

  • Usuário do Brainly
2014-07-02T17:11:58-03:00
5x + 20 . (1 - x) = 5
5x + 20 - 20x = 5
5x - 20x = 5 - 20
- 15x = - 15 . (- 1)
15x = 15
x = 15/15
x = 1
1 5 1
2014-07-02T17:15:24-03:00
5x+20(1-x)=5
5x+20-20x=5
5x-20x=-20+5
-15x=-15 .(-1)
15x=15
x=15/15
x=1
1 5 1