Answer
w = all real numbers; identity
Work Step by Step
1. Given: 12w + 15w - 9 + 5 = -3w + 5 - 9
2. Simplify: 27w - 4 = -3w - 4
3. Add and subtract: 30w = 0
w = all real numbers, so the equation is an identity.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 1 - Section 1.1 - Linear Equations in One Variable - 1.1 Exercises - Page 51: 25
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