Question 937171
standard form of an equation of line is ax+by =c
  given equation is y =2x+3
             add -2x on both sides
 y -2x = 2x+3 -2x
       y-2x= 3
               -2x+y =3
             standard form : -2x+y =3
  given point (x,y)= (2,3)
        -2(2)+3= -4+3
             =-1
but -2x+y=3
   hence the point (2,3) is not the solution