Ответ:
(n - m) - (- 3m - 2n)= n-m+3m+2n= n+2n-m+3m= 3n+2m
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Ответ:
(n - m) - (- 3m - 2n)= n-m+3m+2n= n+2n-m+3m= 3n+2m