Program GIAI_PHUONG_TRINH_BAC_NHAT; Var a,b,x:real; Begin Clrscr; Writeln('GIAI PHUONG TRINH BAC NHAT: AX + B=0'); Writeln('------------------------------------------------------------'); Write ('Nhap a= '); readln(a); Write ('Nhap b= '); readln(b); If(a=0) then If(b=0) then Writeln(' Phuong trinh co vo so nghiem') Else writeln(' Phuong tring vo nghiem') Else Writeln('Phuong trinh co nghiem x=',-b/a:4:2); Readln; End.