Posted by Rose on Wednesday, October 8, 2008 at 11:08pm.
Kelly is nine years older than her sister. Kelly's age is one more than twice her sister's age. What is Kelly's age?
how do I solve this problem?

algebra  Rod, Wednesday, October 8, 2008 at 11:41pm
K = S + 9
K = 2S + 1
s + 9 = 2S + 1
S s
9 = S + 1
8 + S
K = 17

algebra  Rose, Wednesday, October 8, 2008 at 11:46pm
thanks

algebra  gfiyret, Monday, September 14, 2015 at 3:33pm
aDS9UH89REWI0W

algebra  Lu, Wednesday, September 14, 2016 at 7:43pm
John is as many years older than his brother as he is younger sister if you know the age of his brother and is sister, how can you find John's age?
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