I really need an answer, I was absent the day this was discuss and I don't know what to do here please ASAP Annie is 8 years older than Girlie. Two years ago, Annie was twice as old as Girlie. What are their present ages?
I get the first part, which is x-y=8 , but I don't get the other, I multiplied girlie's age bt two and subtract both age by 2 , then what?
I get the first part, which is x-y=8 , but I don't get the other, I multiplied girlie's age bt two and subtract both age by 2 , then what?
1 Answer
Mar 11, 2018
Girlie is 10, Annie is 18
Explanation:
Let Girlie's age be
and Annie's age be
You have correctly found that
The second statement tells us that
two years ago
Hence we solve the equations simultaneously (I have done it by substitution) to find their ages two years ago, then simply add 2 to each of their ages.
then add two to each:
Alt method:
If you are confident rearranging equations,
equation 2 can be written as:
which removes the need to add two later.