Respostas

2013-11-06T19:22:00-02:00
4x + 3x - 9 + 2x = 4x + 5

4x+3x+2x-4x=5+9

5 x = 14

X= 14/5
1 3 1
2013-11-06T19:31:31-02:00
4x - (-5x+9) = 4x + 5
4x + 5x - 9 = 4x + 5
9x - 9 =4 x + 5
9x - 4x= 5+9
5x = 14
x= 14/5