This is the 10476th most frequent Russian word.
взаимовыгодное
Mutually beneficial.
The word 'взаимовыгодное' is used here as an adjective describing the agreement, indicating that it is advantageous for both parties involved.
Они заключили взаимовыгодное соглашение.
They signed a mutually beneficial agreement.
In this sentence, 'взаимовыгодный' modifies 'exchange,' portraying the transaction as beneficial for both parties.
Это был взаимовыгодный обмен услугами.
It was a mutually beneficial exchange of services.
Here, 'взаимовыгодным' is used as a predicate adjective in instrumental case to describe the mode of cooperation, emphasizing its mutual advantages.