Question

Answer 1

`-15/12 x+3/7 = 6/5 x -1/2`

`<=>-15/12 x-6/5 x= -1/2-3/7`

`<=> -49/20 x= -13/14`

`<=> x= -13/14 : (-49/20)`

`<=> x= -13/14 xx (-20/49)`

`<=>x= 130/343`

vậy ...

Answer 2

e: =>-5/4x-6/5x=-1/2-3/7

=>49/20x=13/14

=>x=130/343

Answer 3

\(-\dfrac{15}{12}x+\dfrac{3}{7}=\dfrac{6}{5}x-\dfrac{1}{2}\)
\(\Rightarrow-\dfrac{15}{12}x-\dfrac{6}{5}x=\dfrac{3}{7}+\dfrac{1}{2}\)
\(\Rightarrow-\dfrac{49}{20}x=\dfrac{13}{14}\)
\(\Rightarrow x=\dfrac{13}{14}:\dfrac{49}{20}\)
\(\Rightarrow x=\dfrac{130}{343}\)