Answer
slower train: 41 mph
faster train: 51 mph
Work Step by Step
train A: d*3.5
train B: (d+10)*3.5
$3.5*d+3.5(d+10)=322$
$3.5d+3.5d+35=322$
$7d=287$
$7d/7 = 287/7$
$d=41$
$41+10=51$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 7 - Section 7.6 - Proportions and Problem Solving with Rational Equations - Exercise Set - Page 539: 39
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