Bonjour si quelqu’un pourrait m’aider pour les exercices 37 et 38 merci d’avance

salut
exo 37
a) 3x-8<=0   <=> 3x<=8   <=> x<=8/3     S=] - inf ; 8/3 ]

b) 6-8x-1>=0    <=> -8x>=-5    <=> x<=5/8   S=] - inf ; 5/8 ]

c) 6-7x-1-5x>=4-4x
=> 6-7x-1-5x-4+4x>=0
=> -8x+1>=0   
=> x<= 1/8     S= ] - inf ; 1/8 ]

d) 2-7x+7-9x<-10x-8
=> 2-7x+7-9x+10x+8<0
=> -6x+17<0
=> -6x<-17   <=> x> 17/6     S= ] 17/6 ; + inf [

exo 38
a) 8-4x-9<=7-5x
=> 8-4x-9-7+5x<=0
=> x-8<=0     <=> x<=8       S=] - inf ; 8 ]

b) 3x+3>-2x
=> 3x+3+2x>0
=> 5x+3>0     <=> 5x>-3    <=> x> -3/5      S= ] -3/5 ; + inf [

c) 5x+1<= 8x+(x+7)/3
=> 5x+1-8x-(x+7)/3<=0
=> (15x+3-24x-x-7)/3<=0
=> (-10x-4)/3<=0
=> -10x-4<=0
=> x>=-2/5         S= [ -2/5 ; + inf [

d) (4/3)x-7-8x<5x-1
=> (4/3)x-7-8x-5x+1<0
=> (4x-21-24x-15x+3)/3<0
=>(-35x-18)/3<0
=> -35x<18
=> x> -18/35        S = ] -18/35 ; + inf [