Question 1205855
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The sum of Gigi and Georgina's age 2 years later is 12x + 4. 
Gigi is 3 times as old as Georgina now. 
What will be Georgina's age when Gigi is 15 years old? Leave your answer in terms of x.
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Since the sum of Gigi's and Georgina's ages in 2 years will be (12x + 4),
the sum of their current ages is  ((12x+4)-2-2) = 12x years.


Since the sum of their current ages is 12x and Gigi is 3 times as old as Georgina now,
you can conclude mentally that Georgina is 3x years old , while Gigi is 9x years old.
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