Respostas

2013-11-08T17:51:01-02:00
-5x+45-89=-90+40
-5x=-45+89-90+40
-5x=-135+129
-5x=-6
x=+6/5
1 5 1
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2013-11-08T17:57:27-02:00
- 5x= - 90+40-45+89
-5x=-6
x=-6/5
x= -1,2

1 5 1