## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson

# Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set - Page 284: 25

#### Answer

$2r-6s$

#### Work Step by Step

By combining like terms, the given expression, $3r+s-r-7s ,$ simplifies to \begin{array}{l}\require{cancel} (3r-r)+(s-7s) \\\\= 2r-6s .\end{array}

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