#### Answer

true

#### Work Step by Step

When a solution of an equation is substituted to the variables in the equation, it leads to a true statement.
Substitute $8$ to $x$ to obtain:
$2x+5=x-3
\\2(-8) +5 = -8-3
\\-16+5=-11
\\-11=-11$
Thus, $-8$ is a solution to the given equation.
The given statement is true.