What is the purpose of the key or legend on a map? to help the reader interpret the symbols and colors on the map
to indicate direction (north, south, east, and west)
to show physical features such as rivers, lakes, and mountains
to show the distance from one place to another

to help the reader interpret the symbols and colors on the map

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

and law of cosines,

the three equations are

see attached image for solution.