Solve
To be precise there are exactly a zillion ways to solve this. I'll assume you don't know any of the fancier ones, and do the matrix multiplication. We get three equations:
So solve the first equation for :
and sub that into the remaining two equations:
and
Again, solve the top equation, this time for :
and sub that into the remaining equation:
Now solve for :
Thus
and
So finally
You do the other one.
-Dan