program linearna_rovnica;
var a,b,x:integer;
begin
write('zadaj koeficient a:');
readln(a);
write('zadaj koeficient b:');
readln(b);
if (a=0)and(b=0) then writeln('riesenim su vsetky R cisla')
else if (a=0)and(b<>0) then writeln('rovnica nema riesenie')
else writeln('X=',-b/a:4:2);
ReadLn;
end.