Respostas

2014-08-23T17:02:47-03:00
-5x+45-89+90-41=0
-5x+5=0
-5x=-5
5x=5
x=5/5
x=1
2014-08-23T17:29:33-03:00
- 5x + 45 - 89 = - 90 + 41

- 5x = - 90 + 41 - 45 + 89

- 5x = - 5 . ( - 1 )

5x = 5

x = 5/5

x = 1
1 5 1