Roshel and Jenson collect beads and cards. Jenson has 68 less beads than cards. Jenson has 5 times the number of beads Roshel has, and Roshel has 25% more cards than Jenson. After Roshel gives Jenson all of her beads and Jenson gives Roshel 75% of his cards, Jenson has 21 more beads than cards. Find the number of cards Roshel has at first.

Roshel		Jenson
Cards	Beads	Cards	Beads
6.25 u + 85	1 u	5 u + 68	5 u
+ 3.75 u + 51	- 1 u	- 3.75 u - 51	+ 1 u
10 u + 136	0	1.25 u + 17	6 u

100%+ 25% = 125% 

125% x 5 u
= ¹²⁵₁₀₀ x 5 u
= 6.25 u

125% x 68
= ¹²⁵₁₀₀ x 68
= 85 

75% x 5 u
= ⁷⁵₁₀₀ x 5 u
= 3.75 u  

75% x 68 
= ⁷⁵₁₀₀ x 68
= 51 

If another 21 cards are given to Jenson, he will have equal number of cards and beads in the end.
6 u = 1.25 u + 17 + 21
6 u - 1.25 u = 38
4.75 u = 38

1 u = 38 ÷ 4.75 = 8

Number of cards that Roshel has at first
= 6.25 u + 85
= 6.25 x 8 + 85
= 50 + 85
= 135
 
Answer(s): 135