Problema Solution
last year Grok's mother weighed 3 times as much as Grok since then grok has gained 9 kg and his mother has lost 4 kg now his mother weights only twice as much as grok find the weights now
Answer provided by our tutors
let 'x' represent Grok's weight last year, then '3x' represents his mother's weight at that time
we have this equation:
(x+9) + (3x-4) = 2(x+9)
solving for 'x' we have x=6.5
Grok used to weight 6.5 kg