Respostas

2013-08-18T14:49:31-03:00
A) 2x-2a + 3x-6 = 2x + 12
2x + 3x - 2x = 6 -2a
3x = 6-2a
B) x-5 + 1 -2x = 3x + 12
X -3x -2x = 12+ 5-1
-4x = 16
X =-4
C) 4x + 24-x = 5x
4x -x -5x = -24
-2x = -24
X= 12