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 weighs only twice as much as Grok. Find their

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> 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 weighs only twice as much as Grok. Find their       Log On