Solve the following systems of linear equations by computing the inverses of their coefficient matrices. (a) x

Question:

Solve the following systems of linear equations by computing the inverses of their coefficient matrices.
(a) x + 2y = 1
x - 2y = -2
(b) 3u - 2v = 2
u+5v = l2
(c) x-y + 3z = 3
x - 2y+3z = -2
x -2y + z - 2
(d) y + 5z = 3
x - y + 3z = - 1
-2x + 3y = 5
(e) x + 4y - z = 3
2x+7y-2z = 5
-x - 5y + 2z = -7