Esth had five times as many cards as Rich. Esth gave 1/4 of her cards to Rich. Rich. gave 1/6 of his cards to Esth in return. In the end, Esth had 90 cards more than Rich. How many cards did Esth have at first?
2 answers
is the swap simultaneous, or did Rich give her his 1/6 after he received her 1/4?
Rich gave her his 1/6 after he received her 1/4. Please help