Math Equation

The general method is to multiply all terms by 35 to get rid of denominators.
However your notation is not clear. For example is the first term
(x-3)/7 or x-3/7 ? In either case, multiplying throughout by 35 will still lead to simplification..

It is x- 3/7 thanks for your help

What's your answer ?

My answer is x= -13/5

I get x=-3/5 assuming -(21)/5 (not -2units and 1/5)