Program P65;
 { Tabelul funcţiei y=2*x }
var x, y,
    x1, x2, deltaX : real;
begin
 write('x1='); readln(x1);
 write('x2='); readln(x2);
 write('deltaX='); readln(deltaX);
 writeln('x':10, 'y':20);
 writeln;
 x:=x1;
 while x<=x2 do
  begin
   y:=2*x;
   writeln(x:20, y:20);
   x:=x+deltaX;
  end;
 readln;
end.