2:
a: =>2/3:x=-7-1/3=-22/3
=>x=-2/3:22/3=-2/3*3/22=-1/11
b: =>x:3/4=-2/3-1/4=-8/12-3/12=-11/12
=>x=-11/2*3/4=-33/8
c: =>1/3x+2/5x-2/5=0
=>11/15x=2/5
=>x=2/5:11/15=2/5*15/11=6/11
d: =>3x+1/2=1/4 hoặc 3x+1/2=-1/4
=>3x=-3/4 hoặc 3x=-1/4
=>x=-1/12 hoặc x=-1/4
e: =>x+1/3=2/3 hoặc x+1/3=-2/3
=>x=-1 hoặc x=1/3
f: (3/5)^5*x=(3/5)^7
=>x=(3/5)^7:(3/5)^5=(3/5)^2=9/25
g: =>3x+1=-3
=>3x=-4
=>x=-4/3
h: =>2x-1/3=1/5
=>2x=8/15
=>x=4/15
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