Question 291549
Selection C.


If the identity such as 0 - 0 results from addition of the equation.


An example would be identical lines.


x + y = 3
2x + 2y = 6


These lines are identical.


Multiply the first equation by 2 and then subtract it from the second equation to get:


0 + 0 = 0 which becomes 0 = 0.


If you graph these equation, they will show up on your graph as the same line because the equations are identical.