Answer
$x = 4$
Work Step by Step
The determinant is:
$D = 6 \times x - 1 \times (-2)$
and we know that $D=26$
Therefore
$6 \times x - 1 \times (-2) = 26$
$6x +2 = 26$
$6x = 24$
$x = 4$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix E - Exercise Set - Page 1005: 36
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