If $$2x-3=y+5$$ and $$3y-1=5$$, then $$x=$$． 
Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
From $$3y -1=5$$, then we can get $$y=2$$.  Therefore from $$2x-3=2+5$$, we obtain $$x=5$$. 