Answer
$75$ minutes running and $12x+(\frac{155}{60}-x)30=55$ minutes cycling.
Work Step by Step
Let $x$ be the time spent running. Then the time spent cycling is $\frac{155}{60}-x$. Then our equation is: $12x+(\frac{155}{60}-x)30=55$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.5 Use Problem Solving Strategies and Models - 1.5 Exercises - Problem Solving - Page 39: 32b
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