Armando and Bianca are 290 feet apart when they start walking toward one another. Bianca walks twice as fast as Armando so whenever Armando travels x feet, Bianca travels 2x feet. Let (x) represent the number of feet Armando has
traveled since he started walking toward Bianca.

1.) Let (d) represent the distance (in feet) between Armando and Bianca. Write a formula that expresses (d) in terms of (x).