'common solution' is correct and can be used in written English.
Example: The team discussed several options, but a common solution was not agreed upon.
Cold soups are a common solution.
Is this a common problem and common solution?
A common solution is to use banks' own models.
The most common solution was to cut back on major household purchases or delay vacations.
"I think that a common solution will be found very soon," he added.
Experts say both Salt and University need to traditionally grow to strengthen a common solution.
Warning signs have become an increasingly common solution in cases like this.
But the most common solution, conventional sprinkler systems with timers, can waste water by dowsing lawns already soaked by rain.
On Tuesday, Merkel said the EU needed to find a common solution to the crisis, without recrimination.
The "flying toilet" is a common solution in Indian slums to the lack of bathrooms.
A set of equations that has a common solution is called a system of simultaneous equations.
