College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises: 17

Answer

$-4$

Work Step by Step

Subtract $7$ to both sides to obtain: $7-2x-7=15-7 \\-2x=8$ Divide $-2$ to both sides to obtain: $x =\frac{8}{-2} \\x=-4$
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