Algebra 2 Question Help

Question

Determine if (-1, -1) is a solution to the system of equations.
x + y = 0
x – y = 2

1) Yes

2) No

Answer 1

(-1,-1) is in the form (x,y). So substitute the numbers for each into either equation.  You will find that it does not fit the equations.  -1 + -1 does not equal 0, it equals -2.  So the answer is no.