Uses Crt;

Var  a,b,x : real;

Begin

         Write('a = '); Readln(a);

        Write('b = '); Readln(b);

        If a = 0 Then

          If b = 0 Then

           Writeln('Phuong trinh co vo so nghiem')

         Else

           Writeln('Phuong trinh vo nghiem')

        Else

          Begin

              x:= -b/a;

             Writeln('Phuong trinh co nghiem la :',x:0:2);

         End;

      Readln;

End.

Program Hotboy ;

Uses crt;

Var a,b,x : integer;

Begin

Clrscr

Write(' giai phuong trinh bac nhat ax+b=0');

Write(' nhap so a',a);

Readln(a);

Write('nhap so b',b);

Readln(b)

If a<>0 then

x:=-b/a;

Write('phuong trinh co 1 nghiem duy nhat la',x:2:2)

Else

If a=0 and b=0 then write(' phuong trinh co vo so nghiem');

If a=0 and b<>0 then

Write('phuong trinh vo nghiem');

Readln

End.