Respostas

2013-11-06T16:09:35-02:00
3-(3x-6)=2x+(4-x)
9x+18=8x-2x²
9x-8x+2x²=-18
-x+2x²=-18
2x=18
x=9
2013-11-06T16:15:10-02:00
3 - (3x - 6) = 2x + (4 - x)
3 - 3x +6 = 2x + 4 - x
9 - 3x = x + 4
9 - 4 = x + 3x
4x = 5
x =  \frac{5}{4}