a)9x + 12 >^ 6x
9x - 6x >^ -12
3x >^ -12 | ÷3
x >^ - 4
x =[ -4 , + & )
b)3x - 10 <^ 8 x
3x - 8x <^ 10
-5 x <^ 10
x >^ - 2
x=[-2 , +&)
c) 21 + 2x > 9x
2x - 9x > -21
-7x > - 21
x < 3
x = (-& , 3 )
d) 12 - 4x <^ -x
-4 x + x <^ - 12
-3x <^ -12
x >^ 4
x = [4 , +& )
e) 9x > 4x - 25
9x -4x > -25
5x > - 25
x > -5
x = (-5 , +& )
Sper ca te ajuta .
