Answer
$x=9$
Work Step by Step
To solve an equation, isolate the variable on one side of the equation.
$3x+9+5x=81$
$8x+9=81$
$8x+9-9=81-9$
$8x=72$
$8x\div8=72\div8$
$x=9$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - 1-2 Points, Lines, and Planes - Practice and Problem-Solving Exercises - Page 19: 79
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
