`a)``x3/7=34/14`
`x3/7=17/7`
`x=17/7:3/7`
`x=17/7. 7/3`
`x=17/3`
Vậy `x=17/3`
`b)`` x+30%x=1,3`
`x(1+3/10)=1,3`
`x. 13/10=1,3`
`x.1,3=1,3`
`x=1,3:1,3`
`x=1`
Vậy `x=1`
`c)``x-25%x=1/2`
`x(1-0,25)=0,5`
`x.0,75=0,5`
`x=0,5:0,75`
`x=2/3`
Vậy `x=2/3`
`d)``|x-1/6|-6/16=25%`
`|x-1/6|-3/8=1/4`
`|x-1/6|=1/4+3/8`
`|x-1/6|=2/8+3/8`
`|x-1/6|=5/8`
`=>`\(\left[ \begin{array}{l}x-\frac{1}{6}=\frac{5}{8}\\x-\frac{1}{6}=\frac{-5}{8}\end{array} \right.\) `=>`\(\left[ \begin{array}{l}x=\frac{5}{8}+\frac{1}{6} \\x=\frac{-5}{8}+\frac{1}{6} \end{array} \right.\)`=>`\(\left[ \begin{array}{l}x=\frac{15}{24}+\frac{4}{24} \\x=\frac{-15}{24} +\frac{4}{24} \end{array} \right.\)`
=>`\(\left[ \begin{array}{l}x=\frac{19}{24} \\x=\frac{-11}{24} \end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x=\frac{19}{24} \\x=\frac{-11}{24} \end{array} \right.\)
