Question 11978
There is really nothing to solve here!

You have an algebraic expression {{{-x(3/7 + y)}}} and, unless you are given the values for x and y, you cannot evaluate it.

To "solve" this, it would have to be an "equation" in which the "expression" you have is equal (=) to something. But, no equals, no equation.

The only thing that you can do is to "simplify" this expression by applying the "distributive property". 

Is this what you wanted?

Simplify:

{{{-x(3/7 + y)}}} Apply the distributive property.

{{{-3x/7 - xy}}}