The average weekly number of toy cars produced by Factory E and F is 3709. The average weekly number of toy cars produced by Factory E and G is 7129. If Factory F produced ²₇ as many toy cars as Factory G each week, how many toy cars does Factory E produce weekly?
Total toy cars that Factory E and Factory F produced
= 3709 x 2
= 7418

Total toy cars that Factory E and Factory G produced
= 7129 x 2
= 14258

Number of toy cars produced by Factory F = 2 u
Number of toy cars produced by Factory G = 7 u

Factory E's toys + 2 u = 7418 --- (1)
Factory E's toys + 7 u = 14258 --- (2)

(2) - (1)
7 u - 2 u = 14258 - 7418
5 u = 6840
1 u = 6840 ÷ 5 = 1368

Number of toy cars produced by F
= 2 u
= 2 x 1368
= 2736

Number of toy cars produced by E
= 7418 - 2736
= 4682

Answer(s): 4682