Respostas

2013-10-03T15:17:29-03:00
A) 0 = -5x + 4 5x = 4 x = 4/5 
b) 0= 4x+20-4x=20x = 20/4x=5 
c) 0 = 1/3x + 120-1/3x = 120x= 120/1/-1/3 x= -120/3x = - 40 
d) 0 = x+11-x = 11 (-1)x = -11 
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