Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 10 - Section 10.2 - Systems of Linear Equations in Several Variables - 10.2 Exercises - Page 697: 12


$x=-\frac{7}{2}$ $y=1$ $z=8$

Work Step by Step

From the third equation we can express $\frac{1}{2}z=4 \rightarrow z=8$. Then we can substitute $z=8$ into the second equation to find out the value of y. $2y-z=-6\rightarrow 2y-8=-6 \rightarrow y=1$ By substituting $z=8$ into the first equation we get $4x+3z=10\rightarrow4x+24=10\rightarrow x=-\frac{7}{2}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.