At first, George, Oscar and Albert had the same amount of money. After Albert spent some of his money, George spent ²₇ of his money and Oscar spent ¹₂ of his money, George had $45 more than Oscar. In the end, the total amount of money the three boys had left was $403. How much money did Albert spend?

	George	Oscar	Albert	Total
Before	7x2 =  14 u	2x7 = 14 u	14 u
Change	- 2x2 = - 4 u	- 1x7 = - 7 u	- ?
After	5x2 = 10 u	1x7 = 7 u		$403

The amount that George and Oscar each had at first is the same.  Make the amount that they each had the same.  LCM of 7 and 2 is 14.

Amount that George had more than Oscar in the end
= 10 u - 7 u
= 3 u

3 u = 45

1 u = 45 ÷ 3 = 15

Amount that George and Oscar had in the end
= 10 u + 7 u
= 17 u
= 17 x 15
= $255

Amount that Albert had in the end
= 403 - 255
= $148

Amount that Albert had at first
= 14 u
= 14 x 15
= $210

Amount that Albert spent
= 210 - 148
= $62

Answer(s): $62