Answer
$x=-6$
Work Step by Step
$3x=-18$
$x=-6$
Checking,
$18+10=28$
That works!
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 12 Sequences and Series - Prerequisite Skills - Page 792: 7
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