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5 = a-b+c .............(**)
23 = 9a+3b+c ......(***)
(*) dan (**)
6 = 2a + 2c
3 = a + c ........................(^)
(**) dan (***)
38 = 12a + 3c .................(^^)
(^) dan (^^)
9 = 3a + 3c
38 = 12a + 3c
9a = 29
a = 29/9 ; c = -2/9 ; b = -2