Question

What is the solution to the system of equations
X+y=5
X-2y=2
(_,_)

Answer 1

x + y = 5 => 2x + 2y = 10
                      x  - 2y =  2
                    _________(+)
                     3x        = 12 => x = 12 / 3 => x = 4 => y = 5 - 4 => y = 1
The solution to the system of equations is ( 4 , 1 ).