Answer
x = -3
Work Step by Step
7x + 2x = 8x - 3
Combine like terms:
9x = 8x - 3
Subtract 8x from both sides:
x = -3
Check with substitution:
7(-3) + 2(-3) = 8(-3) - 3
-21 - 6 = -24 - 3
-27 = -27
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 2 - Section 2.1 - The Additon Property of Equality - Exercise Set - Page 100: 13
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