2:
a: =>3x+4>2x+10-3
=>3x+4>2x+7
=>x>3
b: =>2(x-5)+6(-x+1)<=x-2
=>2x-10-6x+6<=x-2
=>-4x-4<=x-2
=>-5x<=2
=>x>=-2/5
1:
a: =>2x-5x=-17-3
=>-3x=-20
=>x=20/3
b: =>3x+3=7+3x
=>7=3(vô lý)
e: =>3x+6=0 hoặc x-7=0
=>x=-2 hoặc x=7
h: =>7-x=0
=>x=7
g: =>(3x-3-2x+7)(3x-3+2x-7)=0
=>(5x-10)(x+4)=0
=>x=2 hoặc x=-4
o: =>2x+3>=0
=>x>=-3/2
n: =>2x+3=3 hoặc 2x+3=-3
=>x=0 hoặc x=-3