Ahhh! Thanks very much!

Can someone help draw a model for this question pls:


Karen is 21 yrs old this year, her mum is 48 yrs old. How many years ago was her mum 4 times as old as Karen?

Ah! I see. Thanks very much, tianzhu!

Thanks, but I need help with modeling for this question. I’m still stuck in algebra days, so can’t help my kid with models…

Need help please…


A man is 4 times the age of his son. 4 years ago, the man was 6 times the age of his son. What are the ages of the man and his son?

Still stuck on algebra…