# Chapter 4 - Polynomials - 4.1 Exponents and Their Properties - 4.1 Exercise Set: 91

$x=-21$

#### Work Step by Step

The solution to the given expression, $-\dfrac{x}{7}=3$, is \begin{array}{l}\require{cancel} -x=3(7) \\\\ -x=21 \\\\ x=-21 .\end{array}

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