The phrase "agreed at last" is correct and usable in written English.
It can be used to indicate that a consensus or agreement has finally been reached after a period of discussion or negotiation.
Example: "After hours of debate, we have agreed at last on the terms of the contract."
Alternatives: "finally reached an agreement" or "settled at last".
In the same week the two countries' highest-ranking home-affairs officials agreed, at last, to a measure of co-operation in investigating the November 2008 Mumbai attacks, in which some 170 people were killed at the city's train station, cafes and Taj hotel.
Meanwhile, Easdaq, a troubled European imitator of Nasdaq, got two new investors, E*Trade and Susquehanna Partners, both of America.American legislators and the White House agreed at last on a bill to amend the Glass-Steagall act, which since 1933 has separated commercial banking, the securities business and insurance.
Iraq has now handed him more documents about its chemical and biological efforts, though there is said to be nothing new in them, and has agreed at last to let U2 intelligence-gathering aircraft fly over Iraq, as Resolution 1441 demanded.
It agreed at last to let the World Health Organisation visit the worst affected area, Guangdong province.
But the fractious Arab states agreed at last that Lebanon's civil war and the prospect of partition threatened them all.
"Ah, so it's the sparkle of the snow you're after," I said, and he happily agreed at last.
These were limits agreed at last year's climate conference in Paris.
Osborne said it was essential for the plan agreed at last week's Brussels summit to be implemented, "including in Greece".
He said 12 countries had now backed a statement agreed at last week's G20 summit calling for a "strong international response".
There are now serious doubts whether a formal conference on the issue can be arranged, as agreed at last year's NPT Review Conference in New York, in time for next year.
But those have now come under attack by financial powers like the United States, Germany and France, which agreed at last week's meeting of the Group of 20 to take more action against tax havens.
