Question

At the start of an adventure game, Ralph had 100 coins. At the end of the game, he had 415 coins. Ralph earned 45 coins for each successful mission. Assuming he did not lose or spend any coins, solving which equation will show how many successful missions Ralph completed?

A. 7x - 100 = 315
B. 7x + 100 = 415
C. 45x - 100 = 315
D. 45x + 100 = 415

Answer 1

I think (D) i’am not sure

Answer 2

Your answer would be B, because you multiply (7)(45) and get 315, while you have too add the original 100 that he started with.

B: 7x + 100 = 415