using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter a");

        double a= double.Parse(Console.ReadLine());

Console.WriteLine("Enter b:");

double b= double.Parse(Console.ReadLine());

if( a==0){

if (b==0){

Console.WriteLine("Every x is solution.");

}

else{

Console.WriteLine("There is no solution.");

}

}

else{

​

Console.WriteLine("x={0}", -b/a);

}

​

}

}