Question 1024853
Assuming your equation is exactly as written here, then you use these properties together:  Additive Inverse, and Addition Property of Equality.  Then you simplify or compute.


x-1/3=2/7


{{{x-1/3=2/7}}}
How do you undo subtraction of  {{{1/3}}}?  You ADD  {{{1/3}}}.


{{{x-1/3+1/3=2/7+1/3}}}


{{{x=2/7+1/3}}}


{{{x=6/21+7/21}}}


{{{x=youFinishThis}}}