Answer
$14$
Work Step by Step
Solving the equation in the previous item results to
$$\begin{aligned}
30n+5n+10&=500
\\
35n&=490
\\
n&=14
.\end{aligned}$$Hence, the walkway will cost $\$500$ when $n=14$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 1 - Foundations for Algebra - 1-8 An Introduction to Equations - Apply What You've Learned - Page 58: b
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