Question

Nina completed a third of her homework problems. But one-half of all the problems she solved had incorrect answers. If 7 of the problems she solved had correct answers, then how many problems are in her homework?

Answer 1

#1: 7 x 2 is one half of her problems.  If you times both of them together you get 14.

#2: And now you times that by 3.

14 x 3 = 42

42 problems are in her homework.

Hope helps!-Aparri