A-B + C = 2 (1) a + B + C = 1 (2) 4A + 2B + C = 3 (3) how to solve the ternary linear equations?
② - ① = 2B = - 3, so B = - 3 / 2, so a + C = 7 / 2, we can know that a = 5 / 6, so C = 8 / 3
Typing is not easy,
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