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𝓟𝓪𝓻𝓴𝓬𝓱𝓪𝓮𝔂𝓸𝓾𝓷𝓰

`a,`

`(2x-3)(3/4x+1)=0`

`=> 2x-3=0` hoặc `3/4x+1=0`

`=> x=3/2` hoặc `x=-4/3`

Vậy `x ∈ {3/2;-4/3}`

`b,`

`2/3x+5/7=3/10`

`=> 2/3x=3/10-5/7`

`=> 2/3x=-29/70`

`=> x=-29/70 : 2/3`

`=> x=-87/140`

Vậy `x=-87/140`

`c,`

`-21/13x+1/3=2/3`

`=> -21/13x=1/3`

`=> x=1/3:(-21/13)`

`=> x=-13/63`

Vậy `x=-13/63`

`d,`

`3/7x+2``3/8=1``2/5`

`=> 3/7x+19/8=7/5`

`=> 3/7x=-39/40`

`=> x=-39/40:3/7`

`=> x=-91/40`

Vậy `x=-91/40`

`e,`

`(5x-1)(2x-1/3)=0`

`=> 5x-1=0` hoặc `2x-1/3=0`

`=> x=1/5` hoặc `x=1/6`

Vậy `x ∈ {1/5;1/6}`

`g,`

`3/7+1/7:x=3/14`

`=> 1/7:x=3/14-3/7`

`=> 1/7:x=-3/14`

`=> x=1/7:(-3/14)`

`=> x=-2/3`

Vậy `x=-2/3`