find alexis's age in terms of x

Question

Jenny is x years old. Thomas is 3 times as old as she is. Jenny is 5 years older then Alexis

Answer 1

From comment above, if you just want Alexis's age in terms of x,

 

Let z = age of Alexis

     x = age of Jenny

 

x = z + 5      (from problem statement)

 

therefore,

 

z = x - 5