Differences between 'agree on', 'agree with' and 'agree to'

[NC7]

Please tell me differences between "agree on", "agree with" and "agree to".

Thanks
NC7

[Alan]

Hi,

They all refer to the idea of acceptance.

Agree on a plan suggests two or more people have the same idea about what should be done.

Agree with a proposal or another person when you accept that proposal or the person's point view because both are the same - yours and theirs.

Agree to often plus an infinitive as in: agree to do something as when you have volunteered to do something.

A
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[NC7]

what about "argree to+N"?
agree to: We have agreed to their request for a full investigation

[Conchita]

Welcome, NC7!

Indeed, you can either agree to something or agree something: We have agreed (to) their request.