Respostas

2013-11-18T19:01:51-02:00
a) 2x= -6
x= -6/2
x= -3

b) -5x= 50
x= 50/-5
x= -10

c)-5x= -10
x= -10/-5
x= 2
2013-11-18T19:12:50-02:00
a) x. (+2) = -6
    x = -6 : (+2)
    x = -3

b) (-5).x = + 50 (-1)
      5.x = -50
         x = -50 : 5
         x = -10

c) x . (-5) = -10
    x         = -10: (-5)
    x         =  +2