Verify if the point (-5,-1) a solution to the system of equation: x+y=4 x-y=6

We'll solve the system using elimination
method.

We'll add the 1st equation to the 2nd
one:

x + y + x - y  = 4 +
6

We'll combine like terms:

2x
= 10

x = 5

y = 4 - x =>
y = 4 - 5 = -1

The solution of the system of equations is
(5 ; -1).

Therefore, the ordered pair (-5 ;
-1) is not the solution of the given system of
equations.