posted by G .
I am solving sytems of equations algrbraically. I have tried several times and I am not comming up with he answers for the following three equations that the book gives.
Answer in book: -1,1/2
Answer in book: -2,0
Answer in book: 1/2,-1
Adding the two equations together gives
the ys on the LHS cancel to give
substitute x=-1 into one of the starting equations.
Have a go at the others.