



 
Hi, Suppose that 4 years ago Terry was $t$ years old and Nia was $n$ years old. Since, at that time Terry was twothirds as old as Nia, \[t = \frac23 n.\] How old is Terry now? How old is Nia now? Now Terry is threefourths as old as Nia. Use this to find a second equation relating $t$ and $n.$ Solve for $t$ and $n.$ Check your answer,  


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