Answer
$x=4$
Work Step by Step
$3x+8=20$
$3x+8-8=20-8$ (Subtracting $8$ from both sides)
$3x=12$
$x=\frac{12}{3}$
$x=4$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Appendix A - Basic Algebra Review - A Exercises - Page A-15: 71
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