Answer
False
Work Step by Step
Although you can substitute a known value in for a variable (for example, for the expression 2x, we can find the value if we know that x=4), the expression itself does NOT have an = sign.
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.1 - Introduction to Algebra: Variables and Mathematical Models - Exercise Set - Page 13: 104
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