Brian and maggie are 230 feet apart when they start walking toward one another. they are walking at the same speed, so whenever brian travels some number of feet, maggie travels the same number of feet. let x represent the number of feet brian has traveled since he started walking toward maggie.

a: write an expression in terms of x that represents the number of feet brian has walked toward maggie since they started walking.

b: write an expression in terms of x that represents the number of feet maggie has walked toward brian since they started walking.