bài 1. 5x-2/3 = 5-3x/2
10x+3/12= 1+ 6+8x/9
7/8x – 5 ( x-9) = 20x + 1.5/6
bài 2. 1/x+1 – 5/x-2= 15/( x+1)(2-x)
1/2x-3 – 3/x( 2x-3)= 5/x
6/x-1 – 4/x-3= 8/2x-6
3/(x-1)(x-2) + 2/(x-2)(x-3) = 1/(x-2)(x-3)
1/x-2 + 5/x+1= 3/2-x
5x/2x+2 + 1= 6/x+1
x+1/x-1 – x-1/ x+1= 4/x^2-1
3x/x-2 – x/x-5= 3x/(x-2)(5-x)
`( 5x-2)/3 = (5-3x)/2`
`<=>2(5x-2)=3(5-3x)`
`<=>19x=19`
`<=>x=1`
`(10x+3)/12= 1+ (6+8x)/9`
`<=>3(10+3)=36+8(3+4x)`
`<=>2x+60=9`
`<=>x=-51/2`
`7/8x – 5 ( x-9) = 20x + 1.5/6`
`<=>7x-40x+360=160x+2`
`<=>358=193x`
`<=>x=358/193`
`1/(x+1 )- 5/(x-2)= 15/(( x+1)(2-x))`
`<=>(x-2)(2-x)-5(x+1)(2-x)=15(x-2)`
`<=>x-4x^2+14+15x-30=0`
`<=>x-2=0`
`<=>x=2(l)`
`2x-3 – 3/(x( 2x-3))= 5/x`
`<=>2x^2(2x-3)-3x(2x-3)-3=5(2x-3)`
`<=>4x^3-12x^2-x+12=0`
`(5x)/(2x+2) + 1= 6/(x+1)`
`<=>5x+2(x+1)=12`
`<=>7x+2=12`
`<=>x=10/7`
Vậy …