Respuesta :

Step-by-step explanation:

25m -5mn +3m -7n

28m -5mn -7n

Answer:

13m-5mn-7n

Step-by-step explanation:

(5m×5)-(5m×n)+3m-7n

10m-5mn+3m-7n

collect like terms

10m+3m-5mn-7n

13m-5mn-7n

:)

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