Answer:
x = - 3
Explanation:
y = 5 +

=
=
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The denominator of y cannot be zero as this would make y undefined
Equating the denominator to zero and solving gives the value that x cannot be and if the numerator is non- zero for this value then it is a vertical asymptote.
x + 3 = 0 ⇒ x = - 3
The vertical asymptote is x = - 3