AX = B --> X = A^-1.B
XA = B --> X = B.A^-1
Melihat soal diatas maka kita pakai rumus yang pertama:
X = A^-1.B A = [a b]
c d
X = 1
____________ . [d -b]. [-8 7]
(axd) - (bxc) -a a 26 -14
X = 1
______________ . [5 1] [-8 7]
(2x5) - (-3x5) 3 2 26 -14
X = 1
______ . [5 1] [-8 7]
10 - 3 3 2 26 -14
X = 1/7 .[-40 + 26 35 + (-14)]
-24 + 52 21 + -28 ]
X = 1/7 [-14 21]
28 -7
X = [-14/7 21/7]
28/7 -7/7
X = [-2 3]
4 -1