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

$x=-10.6$
Adding $-2.8$ to both sides of the given equation, $-7.8=2.8+x$, then, \begin{array}{l} -7.8-2.8=2.8+x-2.8 \\\\ -10.6=x \\\\ x=-10.6 .\end{array}