a: =>2x=8
=>x=4
d: =>3x=15
=>x=5
b: =>2x+1=0 hoặc x-3=0
=>x=-1/2 hoặc x=3
e: =>2x-3=0 hoặc x+2=0
=>x=-2 hoặc x=3/2
c: =>\(\dfrac{5x+2x+2}{2\left(x+1\right)}=\dfrac{12}{2\left(x+1\right)}\)
=>7x+2=12
=>7x=10
=>x=10/7
g: =>\(\dfrac{2x-1+2x-2}{2x-2}=\dfrac{2}{2x-2}\)
=>4x-3=2
=>4x=5
=>x=5/4


