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posted by Evelyn on Sunday, April 15, 2012 at 11:12pm.
Aaron is 13 years older than shelby. in nine years, Aaron will be twice as old as shelby. how old is shelby?
a = s+13 (a+9) = 2(s+9) a - s = 13 a - 2s = 9 s = 4 a = 17 in 9 years: s = 13 a = 26
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