Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 2 - Section 2.2 - An Introduction to Problem Solving - Exercise Set: 58

Answer

Number of arrivals and departures at Frankfurt Airport $= 53$ million London Airport $= 65.9 $million Paris Airport $= 58.2$ million

Work Step by Step

Let Number of arrivals and departures at Frankfurt airport be $x$. At London Airport (in millions) $= x+ 12.9 $ At Paris Airport (in millions) $= x+ 5.2$ Total Number of arrivals and departures at three airports $=177.1$ million $x+x+12.9+x+5.2 = 177.1$ Combine like terms. $3x+18.1 = 177.1$ Subtract $18.1$ on both sides. $3x+18.1-18.1 = 177.1-18.1$ $3x=159$ $x=53$ Number of arrivals and departures at Frankfurt airport (in millions) $= x = 53$ At London Airport (in millions) $= x+ 12.9 $ $=53+ 12.9 $ $= 65.9$ At Paris Airport (in millions) $= x+ 5.2$ $= x+ 5.2 $ $= 53+5.2 $ $= 58.2$
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