Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 12 Sequences and Series - Prerequisite Skills - Page 792: 7

Answer

$x=-6$

Work Step by Step

$3x=-18$ $x=-6$ Checking, $18+10=28$ That works!
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