You can
put this solution on YOUR website!For any fraction, if the denominator is zero -- the fraction is undefined.
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Therefore for your fraction:

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The restricted value(s) of x would be when:
x-4 = 0
Solving for x:
x = 4 (this is the only restricted value)
You can
put this solution on YOUR website!8x/(x-4) restricted values are values of x that make denominator =0 (division by zero isn't allowed)
lets check when denominator is = 0 ----> x-4=0 that happenes when x=4
Then the restricted value is 4