Answer
$x=-4$
Work Step by Step
You can use the physical counters in the book to find the variable, or
$x-3=-7$
Add 3 to both sides
$x=-4$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 3 - Section 3.4 - Group Activity - Modeling Equation Solving with Addition and Subtraction - Page 200: 1
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