"Dobbiamo arrivare ad un accordo."
Traduzione:We need to come to an agreement.
RIPORTO: 'To Arrive to' is not a standard verb expression.
'To arrive in' or 'to arrive at' are the norm. For example:
'To arrive in London' 'To arrive at a meeting'
However, the only way that I can think of where 'arrive' can be followed by 'to' is:
a) When followed by another verb in the infinitive. For example:
'My friend arrived to give me a present'
b) When followed by a clarified noun. For example:
'An answer has arrived to my letter'
I hope this helps