The average weekly number of toy cars produced by Factory A and B is 3487. The average weekly number of toy cars produced by Factory A and C is 6602. If Factory B produced ²₉ as many toy cars as Factory C each week, how many toy cars does Factory A produce weekly?
Total toy cars that Factory A and Factory B produced
= 3487 x 2
= 6974

Total toy cars that Factory A and Factory C produced
= 6602 x 2
= 13204

Number of toy cars produced by Factory B = 2 u
Number of toy cars produced by Factory C = 9 u

Factory A's toys + 2 u = 6974 --- (1)
Factory A's toys + 9 u = 13204 --- (2)

(2) - (1)
9 u - 2 u = 13204 - 6974
7 u = 6230
1 u = 6230 ÷ 7 = 890

Number of toy cars produced by B
= 2 u
= 2 x 890
= 1780

Number of toy cars produced by A
= 6974 - 1780
= 5194

Answer(s): 5194