Respostas

  • Usuário do Brainly
2014-07-14T16:12:22-03:00
(+ 15) - (- 3x) - (+ 7x) + (- 2x) = 0
15 + 3x - 7x - 2x = 0
15 - 6x = 0
- 6x = - 15 . (- 1)
6x = 15
x = 15/6
x = 5/2
1 3 1
2014-07-14T16:15:12-03:00
15-(-3x)-(7x)+(-2x)=0
3x-7x-2x=-15
-6x=-15
x=15/6
1 3 1