Respostas

2013-11-06T15:19:57-02:00
A)4x--8>6x+20 = 
 4x - 6x > 20 + 8 =
 - 2x > 28 = 
  x > -14

B)
5x+3>2x-18 = 
5x - 2x > -18  -3 = 
3x>-21 =
x > -7

C)3x-15<6-2x = 
3x + 2x < 6 + 15 = 
5x<21 = 
x< 21/5

D)2x-7>5x-13 = 
2x - 5x > -13 +7 =
-3x>-6 = 
x>2

E)4-3x<6x-12 =
-3x-6x<-12-4 = 
-9x<-16 = 
x < =16/-9

F)2-4x<12-2x = 
-4x +2x < 12 +4 = 
-2x < 16 =
x < -8

G)8-3x<16-5x = 
-3x + 5x < 16 - 8 =
2x < 8 = 
x < 4

H)9x-14>5+3x = 
9x -3x > 5 +14 = 
6x> 19 =
x > 19/5