SOLUTION: I need help determining which value, if any, should be excluded from the domain of the variable in the expression 8/x+7

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Question 336101: I need help determining which value, if any, should be excluded from the domain of the variable in the expression 8/x+7
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
With an expression such as you have here: 8%2F%28x%2B7%29 in which the variable (x) appears in the denominator, you must exclude all values of the variable that would make the denominator equal zero.
So, looking at the denominator, if we set it equal to zero we can find those values:
x%2B7+=+0 Subtract 7 from both sides.
x+=+-7
In this case, there is only one value of x that would make the denominator equal zero, and that's x = -7, so -7 should be excluded from the domain.