Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 4 - Section 4.4 - Systems of Linear Equations and Problem Solving - Exercise Set - Page 321: 40

Answer

55 children, 332 adults

Work Step by Step

$x$ adults at 6.8 $387-x$ children at 3.4 387 total people for total of 2444.60 $6.8*x+3.4*(387-x)=2444.60$ $6.8x+1315.8-3.4x=2444.6$ $3.4x = 1128.8$ $3.4x/3.4 = 1128.8/3.4$ $x=332$ $387-332 = 55$
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