# Chapter R - Elementary Algebra Review - R.1 Introduction to Algebraic Expressions - R.1 Exercise Set - Page 939: 80

$9r+3s$

#### Work Step by Step

By combining like terms, the given expression, $16r+(-7r)+3s ,$ simplifies to \begin{array}{l}\require{cancel} 16r-7r+3s \\\\= (16r-7r)+3s \\\\= 9r+3s .\end{array}

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