Giải hết giúp em ạ :(

`5 . ` 

`a . ` `-2x+1/5x=3`

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

`-9/5x=3`

`x=3:(-9/5)`

`x=-5/3`

`- - - - - - - - - - - - - - `

`b . ` `8/5x-x=(-9)/10`

`(8/5x-1x)=(-9)/10`

`3/5x=(-9)/10`

`x=(-9)/10:3/5`

`x=-3/2`

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`c . ` `-3x+(4x-10/21)=9/21`

`-3x+4x-10/21=9/21`

`(-3x+4x)-10/21=9/21`

`1x-10/21=9/21`

`1x=9/21+10/21`

`1x=19/21`

`x=19/21:1`

`x=19/21`

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`d . ` `2/3x-(-1/3x-4/7)=9/7`

`2/3x+1/3x+4/7=9/7`

`(2/3x+1/3x)+4/7=9/7`

`1x+4/7=9/7`

`1x=9/7-4/7`

`1x=5/7`

`x=5/7:1`

`x=5/7`

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`6 . `

`a . ` `1/3x-1,75-7/3x=-1`

`1/3x-7/4-7/3x=-1`

`(1/3x-7/3x)-7/4=-1`

`-2x-7/4=-1`

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

`-2x=3/4`

`x=3/4:(-2)`

`x=-3/8`

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`b . ` `5/6x+x-1/3x=(-9)/4`

`(5/6x+1x-1/3x)=(-9)/4`

`3/2x=(-9)/4`

`x=(-9)/4:3/2`

`x=-3/2`

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`c . ` `0,2x+(2/5x-1,7x)=(-11)/10`

`0,2x+(2/5x-17/10x)=(-11)/10`

`(0,2x+2/5x-17/10x)=(-11)/10`

`-11/10x=(-11)/10`

`x=(-11)/10:(-11/10)`

`x=1`

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`d . ` `9/11x-(x+9/22x)=-2`

`(9/11x-1x+9/22x)=-2`

`-13/22x=-2`

`x=(-2):(-13/22)`

`x=44/13`

`\text{#me}`