Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 9 - Section 9.3 - Solving Pairs of Linear Equations by Substitution - Exercises: 6

Answer

(7,-14)

Work Step by Step

$3x-2y=49$ $y=-2x$ Substitute -2x for y in the first equation. $3x-2(-2x)=49$ $\longrightarrow$ simplify $7x=49$ $\longrightarrow$ divide both sides by 7 $7x\div7=49\div7$ $\longrightarrow$ simplify $x=7$ Substitute 7 for x in the second equation. $y=-2(7)$ $\longrightarrow$ simplify $y=-14$
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.