Respostas

A melhor resposta!
2014-07-28T21:13:02-03:00
A)7 + 2X + 6 = 8 - 5X + 5
2X + 5X = 8 + 5 -7 -6
7X = 0
X = 0/7 = 0

b) 8X -24 + 10 - 2X = - X
   7X = 14
    x= 14/7 =  2

c) -4X + 6 -10 + 5X = 6X + 9
6 -10 -9 = 6X + 4X - 5X
- 13 = 5X
X = -13/5


1 5 1