Which ordered pair is a solution of the system of inequalities below?

What does x = in this equation x+3+2x=x+5

What can you determine about the solutions of this system

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?