The average weekly number of robots produced by Factory K and L is 3537. The average weekly number of robots produced by Factory K and M is 6337. If Factory L produced ²₇ as many robots as Factory M each week, how many robots does Factory K produce weekly?
Total robots that Factory K and Factory L produced
= 3537 x 2
= 7074

Total robots that Factory K and Factory M produced
= 6337 x 2
= 12674

Number of robots produced by Factory L = 2 u
Number of robots produced by Factory M = 7 u

Factory K's toys + 2 u = 7074 --- (1)
Factory K's toys + 7 u = 12674 --- (2)

(2) - (1)
7 u - 2 u = 12674 - 7074
5 u = 5600
1 u = 5600 ÷ 5 = 1120

Number of robots produced by L
= 2 u
= 2 x 1120
= 2240

Number of robots produced by K
= 7074 - 2240
= 4834

Answer(s): 4834