An agreement between two parties that benefits them both is

An agreement between two parties that benefits them both is called a contract.

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Contract, is the right answer.

Explanation:

A contract is an authorized requisite agreement which catalogs and regulates the rights and obligations of the parties to the contract. A contract is licitly enforceable because it satisfies the terms and acquiescence of the bill. This generally includes the interchange of goods, services, money, or obligations of any of those.

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