Nobody-
I never would have gotten it.
My next guess was going to be a “kick me” sign.
Dr. Pepper-
Some of us (me) had real problems with high school math.
I think you were (are?) a very good teacher because you are an excellent bal masbir.
Never having heard of Cramer’s Rule, I looked it up. In the case of
2x + y + z = 3
x + 2y + z = 0
I understand it except for this part:
|2 1 1|
D = | 1 -1 -1| = (-2)+(-1)+(2)
|1 2 1| -(-1)-(-4)-(1)=3
Where do the numbers used in “(-2)+(-1)+(2)-(-1)-(-4)-(1)” come from? (If this is an unreasonable question to ask “al regel achas”, please let me know – I don’t want to be an advantagist).
“Reb” can also stand for Rebetzin, which I assume is what you meant when addressing “anon for this”.