Answer
The solution is -4.
Work Step by Step
-4x-16=0
-4x-16+16=0+16
-4x=16
$\frac{-4x}{-4}$=$\frac{16}{-4}$
x=-4
check
-4x-16=0
-4(-4)-16=0
16-16=0
0=0
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