Valen, Fabian, Pierre and Bryan paid a total of $210 for a gift. Bryan paid ²₅ of what the rest paid. Valen paid 50% of what the rest paid. Fabian and Pierre paid an equal amount of money. How much did Pierre pay?

Valen	Fabian	Pierre	Bryan	Total
5x3			2x3	7x3
1x7	2x7			3x7
	1	1
7 u	4 u	4 u	6 u	21 u

50%= ⁵⁰₁₀₀= ¹₂
Valen's share : Total share = 1 : 2

The total amount paid for the gift is repeated.  Make the total amount the same.  LCM of 7 and 3 is 21.

Amount that Fabian, Pierre and Bryan paid = 14 u

Amount that Fabian and Pierre paid
= 14 u - 6 u
= 8 u

The amount that Fabian and Pierre each paid is the same.

Amount that Fabian and Pierre each paid
= 8 u ÷ 2
= 4 u

Cost of the gift = 21 u

21 u = 210

1 u = 210 ÷ 21 = 10

Amount that Pierre paid
= 4 u
= 4 x 10
= $40

Answer(s): $40