Respostas

2013-10-14T13:50:22-03:00
17x - 15 = 2 (2-x) 
17x - 15 = 4 - 2x
17x + 2x = 4 + 15
19x = 19
x= 19/19 = 1

(x-1)/3 = (x+4)2 - 3
x-1 = (x-4)2 -3.3
x-1 = 2x+8 - 9
2x - x = -1+1
x=0

(x+3)-(x+1)=2x-2
x+3-x-1=2x-2 
2x=2-2
2x=0
x=2