Answer
$-7/2$
Work Step by Step
Subtracting 3 from each side gives,
$8/7*d=-4$
Then multiplying both sides by $7/8$ gives $d=-7/2$
Checking gives: $3-4=-1$ which is true.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.3 Solve Linear Equations - 1.3 Exercises - Skill Practice - Page 21: 18
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