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 Question from Dee: Blair is 12 years younger than Serena right now. Three years ago Serena’s age was five times Blair’s age. What are their ages?

Hi Dee,

Suppose Blair is $b$ years old and Serena is $s$ years old. Blair is 12 years younger than Serena. Write this fact as an equation in $b$ and $s.$

Five years ago how old was Blair? How old was Serena? At that time Serena's age was five times Blair's age. Write this fact as an equation in $b$ and $s.$

Solve the two equations.