Đáp án:
Giải thích các bước giải:
`a)``x-7/36=(-4)/7-x`
`x+x=7/36+(-4)/7`
`2x=(-95)/252`
`x=(-95)/490`
`b)``(0,2)/(|2x-1|)-20/11.13-20/13.15-20/15.17-...-20/53.55=3/11`
`(0,2)/(|2x-1|)-(20/11.13+20/13.15+20/15.17+...+20/53.55)=3/11`
`(0,2)/(|2x-1|)-10(2/11.13+2/13.15+2/15.17+...+2/53.55)=3/11`
`(0,2)/(|2x-1|)-10(1/11-1/13+1/13-1/15+1/15-1/17+...+1/53-1/55)=3/11`
`(0,2)/(|2x-1|)-10(1/11-1/55)=3/11`
`(0,2)/(|2x-1|)-10*4/55=3/11`
`(0,2)/(|2x-1|)-8/11=3/11`
`(0,2)/(|2x-1|)=1`
`|2x-1|=0,2.1`
`|2x-1|=1/5`
\(\left\{ \begin{array}{l}2x-1=\dfrac{1}{5}\\2x-1=\dfrac{-1}{5}\end{array} \right.\)`=>`\(\left\{ \begin{array}{l}x=\dfrac{3}{5}\\x=\dfrac{2}{5}\end{array} \right.\)
