Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction

What is the common difference in the following arithmetic sequence 7,3,-1,-5

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m

9is the geometric mean between x and 12