`a)(4x+3)/5-(6x-2)/7=(5x+4)/3+3`

`=>21(4x+3)-15(6x-2)=35(5x+4)+315`

`<=>84x+21-90x+30=175x+140+315`

`<=>181x=-404`

`<=>x=-404/181`

`b)(5x+2)/6-(8x-1)/3=(4x+2)/5-5`

`=>15(5x+2)-30(8x-1)=18(4x+2)-450`

`<=>237x=474`

`<=>x=2`

`c)(2x-1)/5-(x-2)/3=(x+7)/15`

`=>3(2x-1)-5(x-2)=x+7`

`<=>x+7=x+7`(luôn đúng)

`d)(5(x-1)+2)/6-(7x-1)/4=(2(2x+1))/7-5`

`=>14.5(x-1)+28-21(7x-1)=24(2x+1)-420`

`<=>125x=399`

`<=>x=399/125`

`e)x/3-(2x+1)/6=x/6-x`

`=>2x-2x-1=x-6x`

`<=>5x=1`

`<=>x=1/5`

`f)(2(3x+1)+1)/4-5=(2(3x-1))/5-(3x+2)/10`

`=>10(3x+1)+20-100=8(3x-1)-2(3x+2)`

`<=>12x=58`

`<=>x=29/6`