## Requirements

You will write a program to solve a linear equation, ax + b = 0.

For example, 2x + 6 = 0 is a linear equation, with the 2 being a and the 6 being b.

The user enters the equation to be solved in the form of the coefficients a and b.

The program then calculates and displays its solution.

## Hint

To solve a linear equation:

If a is not zero, the obvious solution is -b/a.

## Demo

using System;
class Program{// ww w .j a v a 2s . co m
static void Main(**string**[] args)
{
// Inputs
Console.Write("Enter a: ");
**string** inputA = Console.ReadLine();
**double** a = Convert.ToDouble(inputA);
Console.Write("Enter b: ");
**string** inputB = Console.ReadLine();
**double** b = Convert.ToDouble(inputB);
// Solving the equation
if (a != 0)
{
// a is non-zero, the equation has "normal" solution
**double** solution = -b / a;
Console.WriteLine("Solution is x=" + solution);
}
else
{
// a is zero, result depends on b
if (b == 0)
{
Console.WriteLine("The equation \"is solved\" by any x");
}
else
{
Console.WriteLine("The equation does not have a solution");
}
}
}
}

## Result