What are the Laws of simultaneous equation.

Simultaneous equations are a set of two or more equations with the same variables that must be solved together to find a common solution that satisfies all equations. The primary methods used to solve them are:

1. Substitution Method: This involves solving one equation for one variable and then substituting that expression into the other equation to solve for the remaining variable.
2. Elimination Method: This method involves adding or subtracting the equations (often after multiplying one or both by a constant) to eliminate one of the variables, allowing you to solve for the other.
3. Graphical Method: This involves graphing each equation on the same coordinate plane. The point where the lines intersect represents the solution that satisfies both equations.