A solid has 14 faces and 12 vertices. How many edges does the solid have

Number of faces + (Number of vertices - Number of edges) = 2

14 + (12 - x) = 2

12 - x = 2 - 14

12 - x = - 12

- x = - 12 - 12

-x = - 24

x = 24

There would be 24 edges.

(Credit to Taskmasters who answered a question similar previously)