`a)3x-8=0`
`<=>3x=8`
`<=>x=8/3`
`b)-2x^2+x=0`
`<=>x(-2x+1)=0`
`<=>x=0` hoặc `-2x+1=0`
`<=>x=0` hoặc `x=1/2`
`c)8/3*x-5=0`
`<=>8/3*x=5`
`<=>x=5:8/3`
`<=>x=15/8`
`d)3x^2-27x=0`
`<=>3x(x-9)=0`
`<=>x=0` hoặc `x=9`
`e)4x - 3/2=0`
`<=>4x=3/2`
`<=> x=3/8`
`f)5x - 3x^2=0`
`<=>5(5-3x)=0`
`<=>5-3x=0`
`<=>x=5/3`
`g)6-2/3x=0`
`<=> 2/3x=6`
`<=>x=9`
`h)5x^3+10x=0`
`<=>5x(x^2+2)=0`
`<=>x=0`
`i)5x - 3=0`
`<=>5x=3`
`<=>x=3/5`
`j)4x - x^2=0`
`<=>x(4-x)=0`
`<=>x=0` hoặc `x=4`