Question

What is the solution of the following system?
x - y=11
-x + y= -11

Answer 1

there is an infinite amount of solutions

Answer 2

Do you want a proof or do you know why

Answer 3

x = y + 11
-x + y= -11
-(y+11) + y = -11
-y - 11 + y = -11
y - 11 = y - 11
y = y
when you have a number equal to itself ex 0=0, then there is an infinite amount of solutions. y could be anything for it to be a solution