"commonly agree" is a correct and usable phrase in written English.
It means that something is generally accepted or believed to be true by most people. Example: It is commonly agreed that education is the key to success.
"You put on a different pair of eyes, and commonly agree what's the better idea, and not who did it".
Humanity may commonly agree that there is evil, but what one people calls evil another calls good.
Scientists, nutritionists and dieticians do not classify foods in "High ORAC" scores although they commonly agree on the health benefits of a diet based on fruits and vegetables.
Educational experts commonly agree that tailor-made guidance is the most efficient way to foster the learning and developmental process of learners.
Critics commonly agree that Shiny Festa, while it appeals to the franchise's existing fans, is accessible and welcoming to new fans whose first exposure to the franchise is its anime adaptation.
Although such disease is resectable, clinicians commonly agree that the prognosis is poor in pT4a-staged tongue carcinoma, despite currently aggressive treatment.
He asks whether China will pursue sovereignty through commonly agreed norms or by use of force.
"What has been seen and absorbed is commonly agreed to have been of the 'Divine.' ".
Unlike magazine or book editors, site designers are hampered by a lack of commonly agreed upon conventions on the Web.
And even if there were, there is no set of commonly agreed principles upon which governance could be based.
Short of international action commonly agreed and commonly followed through, it is hard even for a large country to make a difference on its own.
