Chapter 3 - Equations and Problem Solving - 3.3 - More on Solving Equations and Problem Solving - Problem Set 3.3 - Page 114: 23

$x=-\dfrac{13}{2}$

Using the properties of equality and combining like terms, the value of the variable that satisfies the given equation, $ -3x+5=-5x-8 ,$ is \begin{array}{l}\require{cancel} -3x+5x=-8-5 \\\\ 2x=-13 \\\\ x=-\dfrac{13}{2} .\end{array}