if you have two negatives on the elimination method do you subtract or add
Do you mean for simultaneous equations like these?
\(5x-3y=8\quad(1)\\ 12x-3y=5\quad(2)\\ \mbox{Here you would subtract because }-3y- -3y=-3y+3y=0 \\~\\ 5x-12x-3y- -3y=8-5\\ -7x = 3\\ x=-3/7\)
Then sub in to find y :)
It all depends on what you are doing. Give us a numerical example and will tell you exactly what you should do.
