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2014-08-26T10:47:24-03:00
11+2x+3=-5x+2+x 
2x+5x-x = -11-3+2
7x-x = -14+2
6x = -12
x = -  \frac{12}{6}

X = -2
3 5 3
2014-08-26T10:50:49-03:00
11+2x+3 = -5x+2+x
2x+5x-x= 2-11-3
6x=-12
x=12/6
x=2
1 5 1