D. ms. b and ms. d are writing problems for an algebra book. ms. b started with

D. ms. b and ms. d are writing problems for an algebra book. ms. b started with ten problems already
written, and she can write six problems an hour. ms. d had no problems written, but she writes ten
problems an hour. when will ms. d have the same number of problems written as ms. b? how many
problems will they each have written at that time?