Question

resolva as inequações:
a)5x-2>0

b)4(x-2)<8x+12

c)3x+14>0

d)x+4<0

e)-4x-7>9

f)6x+8<16 

Answer 1

a) 5x-2>0
5x>2
x>2/5


b)
4(x-2)<8x+12
4x-8<8x+12
4x-8x<12+8
-4x<22 (-1)
4x>-22
 x>-22/4
 x>-8



c) 3x+14>0
3x>-14
x>-14/3
 

d) x+4<0
x<-4
 
e) -4x-7>9
-4x>9+7
-4x>16. (-1)
4x<-16
x<-16/4
x<-4
 
f) 6x+8<16
 6x<16-8
6x<8
x<8/6
x<4/3