When solving a system of equations by substitution, what is meant by a useless result (12=12)?

Question

anonymous · Answer

@mathmale @Gabylovesyou @Mel98

texaschic101 · Answer

well...it means there is infinite solutions

mathmale · Answer

Hello, JZ!  Sorry for the delay in responding.  I'm on a very long auto trip at the moment.
What was the context in which you read "useless result?"  I'd like to be certain of the context before spouting words of wisdom.    ;)    

12=12 is an identity and is always true.  
Were you to start with an equation and show that the left side = 12 and the right side is = 12 also, then again you have a statement that is always true.  If  you solve a system of linear equations and substitute the x- and y-coordinates of your solution into either or both of the original equations, either or both will be true; this serves as a check on your own work and would not deserve to be labelled "useless."

anonymous · Answer

thanks so much and i like it how u call me JZ
lol ur offically even awesomer than before :P

texaschic101 · Answer

that is kinda cool...JZ...it just sounds really neat

anonymous · Answer

yeah lol