The average weekly number of toy cars produced by Factory Q and R is 3630. The average weekly number of toy cars produced by Factory Q and S is 7010. If Factory R produced ²₇ as many toy cars as Factory S each week, how many toy cars does Factory Q produce weekly?
Total toy cars that Factory Q and Factory R produced
= 3630 x 2
= 7260

Total toy cars that Factory Q and Factory S produced
= 7010 x 2
= 14020

Number of toy cars produced by Factory R = 2 u
Number of toy cars produced by Factory S = 7 u

Factory Q's toys + 2 u = 7260 --- (1)
Factory Q's toys + 7 u = 14020 --- (2)

(2) - (1)
7 u - 2 u = 14020 - 7260
5 u = 6760
1 u = 6760 ÷ 5 = 1352

Number of toy cars produced by R
= 2 u
= 2 x 1352
= 2704

Number of toy cars produced by Q
= 7260 - 2704
= 4556

Answer(s): 4556