The phrase "acceptable formula" is correct and usable in written English.
You can use it when referring to a formula that meets certain standards or criteria for approval or use.
Example: "The scientist presented an acceptable formula for the chemical reaction that would yield the desired results."
Alternatives: "valid formula" or "satisfactory formula".
The discussions over the past week, like previous talks, sought to find an acceptable formula for international participation in the process.
For instance, even if the plaintiffs establish that Microsoft abused its monopoly by overcharging for Word and other software, they will have to come up with an acceptable formula for determining how much of the overcharge was absorbed by manufacturers like Dell Computer and Compaq Computer.
Although Mr Abbas put a different slant on the offer, they were groping towards what some diplomats say might be a mutually acceptable formula: an acknowledgment of the Palestinians' right of return that would largely be symbolic, rather than a passport for millions.
This method determines moisture content in grain using a simple and acceptable formula: ({text{moisture content}} = frac{text{mass change}}{text{initial mass}} times 100).
It offers a detailed, mutually acceptable formula for a comprehensive final-status agreement.
Though common wisdom would suggest this is a sticking point, finding a mutually acceptable formula need not be impossible.
William's chief concern for the next four years was the command of the Dutch armies in Flanders, though Dutch domestic affairs and repeated attempts to find an acceptable peace formula took much of his time.
Thus, the capacity should be calculated by the acceptable gap formula.
The Turks hope that the British, who hold the rotating EU presidency, will devise a formula acceptable to them (and to their public).
Margunios sought a theological compromise formula acceptable to both Latin and Greek churches for the disputed Filioque clause in the Latin version of the Nicene Creed.
If Portsmouth cannot find the outstanding money, then the governing body will have to find a formula acceptable to the relevant clubs – thought to include Spurs and Chelsea – for dividing the instalment.
