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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