a)\(x+\dfrac{1}{3}=\dfrac{3}{4}\)
\(x=\dfrac{9}{12}-\dfrac{4}{12}=\dfrac{5}{12}\)
b)\(x+\dfrac{1}{5}=\dfrac{3}{7}\)
\(x=\dfrac{15}{35}-\dfrac{7}{35}=\dfrac{8}{35}\)
c)\(x+\dfrac{2}{3}=\dfrac{7}{12}\)
\(x=\dfrac{7}{12}-\dfrac{8}{12}=-\dfrac{1}{12}\)
`x+1/3=3/4`
`=>x=3/4 -1/3`
`=>x=9/12-4/12`
`=>x= 5/12`
`-----------`
`x+1/5=3/7`
`=>x=3/7-1/5`
`=>x= 15/35-7/35`
`=>x= 8/35`
`--------`
`x+2/3=7/12`
`=>x=7/12-2/3`
`=>x= 7/12-8/12`
`=>x=-1/12`