In Exercises 5 to 14, find the value of x in each proportion.
a) 

b) 

Intermediate Algebra
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Research Methods for the Behavioral Sciences (MindTap Course List)
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Mathematics: A Practical Odyssey
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Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)
Calculus Volume 1
Introductory Statistics