Answer
$\frac{3}{2}\,ft$
Work Step by Step
Let the spacing between the posters be $x\,ft$.
Then,
$15=3+2+x+2+x+2+3$
$\implies 12+2x=15$
$\implies 2x=15-12=3$
$\implies x=\frac{3}{2}\,ft$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 1 - Solving Linear Equations - 1.1-1.3 - Quiz - Page 26: 18
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