The value of the given rational expression when x = 5 is: -2.
A rational expression can be defined as the quotient of two polynomials, that is, a fraction having its numerator and denominator expressed as polynomials.
Given the expression, 15 - x / x - 10, when x = 5, substitute the value of x into the rational expression:
15 - 5 / 5 - 10
10/-5
= -2.
The value of the rational expression is: -2.
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