Respostas

2013-12-17T01:03:49-02:00
-15 - 11 x = -9 - 3x

-11 x +3 x = -9 +15

-8x = 6

x= 6/-8

x= -3/4
2013-12-17T01:12:45-02:00
- 15 - 11x = - 9 - 3x
- 11x + 3x = - 9 + 15
- 8x = 6
x = 6 ÷ (- 8)
x = - 0,75    ou - 3/4