Ответ:
-(а+9)+(m-7)-(n-a) = -a - 9 + m - 7 - n + a = -9 + m - 7 - n = -16 + m - n = -16 + 38 - 22 = -6
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Ответ:
-(а+9)+(m-7)-(n-a) = -a - 9 + m - 7 - n + a = -9 + m - 7 - n = -16 + m - n = -16 + 38 - 22 = -6