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(c d)(5) ( 6)
2a + 5b = -8
2c + 5d = 6
(a b)(-3) = (-5)
(c d)(1) (-9)
-3a + b = -5
-3c + d = -9
2a + 5b = -8 kalikan 3 6a + 15b = -24
-3a + b = -5 kalikan 2 -6a + 2b = -10
----------------------- +
17b = -34
b = -2
2a + 5b = -8
2a = 2
a = 1
2c + 5d = 6 kalikan 3 6c + 15d = 18
-3c + d = -9 kalikan 2 -6c + 2d = -18
-------------------- +
17d = 0
d = 0
-3c + d = -9
-3c = -9
c = 3
jadi M = (1 -2)
(3 0)