At first, Sam, Vaidev and George had the same amount of money. After George spent some of his money, Sam spent ³₇ of his money and Vaidev spent ³₄ of his money, Sam had $126 more than Vaidev. In the end, the total amount of money the three boys had left was $477. How much money did George spend?

	Sam	Vaidev	George	Total
Before	7x4 =  28 u	4x7 = 28 u	28 u
Change	- 3x4 = - 12 u	- 3x7 = - 21 u	- ?
After	4x4 = 16 u	1x7 = 7 u		$477

The amount that Sam and Vaidev each had at first is the same.  Make the amount that they each had the same.  LCM of 7 and 4 is 28.

Amount that Sam had more than Vaidev in the end
= 16 u - 7 u
= 9 u

9 u = 126

1 u = 126 ÷ 9 = 14

Amount that Sam and Vaidev had in the end
= 16 u + 7 u
= 23 u
= 23 x 14
= $322

Amount that George had in the end
= 477 - 322
= $155

Amount that George had at first
= 28 u
= 28 x 14
= $392

Amount that George spent
= 392 - 155
= $237

Answer(s): $237