SOLUTION: If y varies directly with x and y = 12 when x = 9, find x when y = 15

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Question 121489:
If y varies directly with x and y = 12 when x = 9, find x when y = 15
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
9/12=X/15
12X=9*15
12X=135
X=135/12
X=11.25 ANSWER.