The cost to mail a letter is a base charge of $0.42 plus $0.17 for each once. Write a equation that could be used to find how ounces a letter that costs $0.93 weighs. (Let x represent the number of ounces)

A) 0.59x = 0.93

B) 0.42x + 0.17 = 0.93

C) 0.59 = 0.93x

D) 0.42 + 0.17x = 0.93

PLEASE HELP