How would I solve for x?

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12