To be of one mind; concur; consent; promise; correspond; match.
You agree with that, I know. – The Nether World by George Gissing
So I agree to what thou sayest, and tell thee that thou hast acted well and nobly." – A Struggle for Rome, Vol. 2 (of 3) by Felix Dahn
I don't know if you'll agree to this one, however! – Where Deep Seas Moan by E. Gallienne-Robin