Question 1178629
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Cha is two years older than Anna, and Marge is three years older
than Cha. A year ago, the product of Anna’s age and Marge’s age
was exactly equal to the square of Cha’s age. What is the current
age of each girl?
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<pre>
Cha             n+2
Anna            n
Marge           n+5
</pre>

One year ago:  {{{(n-1)(n+4)=(n+1)^2}}}
You can take the steps from here.