ERMAHGERD I JUST FOUND MY OLD NOTES ON IT
Say you have
+2x +2y=4 (you choose to eliminate one of the variables, in this case, the -2y, so you eliminate it by adding 2y, and then you have to add two across the equation. Granted, I don't know where the 4 came from that)
So now you have
Then, you just check your answer! (By substituting the 1 for the x in the original equation)
So, you take one of the variables and get it on the side of the equals sign that doesn't have a variable yet using opposite symbols. Eg, 2x-3y=6 to 2x=6+3y
I honestly can't remember what next-- I'm in 8th grade math too, but that section was a while ago for me.
Oh oh oh oh oh I REMEMBER
Then when you have 2x=6+3y
Nope. Must've done something wrong.
Sorry. I can't remember ANYTHING.... good luck