SOLUTION: In one season, Kim ran 18 races. This was four fewer races than twice the number of races Kelly ran. How many races did Kelly run?

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Question 240561: In one season, Kim ran 18 races. This was four fewer races than twice the number of races Kelly ran. How many races did Kelly run?
Answer by College Student(505) About Me  (Show Source):
You can put this solution on YOUR website!
Hello!
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If Kelly ran x number of races, we can then say Kim ran 2x-4=18.
So we now solve for x to determine how many races Kelly ran.
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2x-4=18
2x=18%2B4
2x=22
x=22%2F2
x=11
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Since Kelly is x, she ran 11 races.
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Let's check for Kim's number of races.
2x-4=18
%282%2A11%29-4=18
22-4=18
18=18 ... it checks!
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Done! :)