program giai_phuong_trinh_by_bkpro;
uses crt;
var a,b: integer;
begin
clrscr;
writeln('Chuong Trinh Giai PT bac 1: ax+b=0');
writeln('Nhap a va b'); readln(a,b);
If (a=0) and (b<>o) then writeln('Phuong trinh vo nghiem');
If (a=0) and (b=0) then writeln('Phuong trinh co vo so nghiem');
If (a<>0) and(b<>0) then writeln('Phuong trinh co nghiem x=',(-b)/a);
readln;
end.