Harry and Warren went shopping with a total amount of $444. They had $370 left after shopping. Harry's remaining money was 3 times the amount he paid for. Warren's remaining money was 7 times the amount he had spent.

1. How much did Warren spend?
2. How much did Warren bring along for shopping?

	Harry	Warren	Total
Before	4 u	8 p	444
Change	- 1 u	- 1 p	- 74
After	3 u	7 p	370

(a)
Amount that Harry and Warren spent
= 444 - 370
= $74

Amount that Harry and Warren spent
= 1 u + 1 p

1 u + 1 p = 74
1 u = 74 - 1 p --- (1)

Amount that Harry and Warren had left
= 3 u + 7 p 

3 u + 7 p = 370
3 u = 370 - 7 p --- (2)

Make u the same.

(1) _{x 3}
3 u = 222 - 3 p --- (3)

(3) = (2)
222 - 3 p = 370 - 7 p 
7 p - 3 p = 370 - 222

4 p = 148

1 p = 148 ÷ 4 = 37

Amount that Warren spent = $37

(b)
Amount that Warren brought along
= 8 p
= 8 x 37
= $296

Answer(s): (a) $37; (b) $296