## Algebra: A Combined Approach (4th Edition)

Substitute -5 for x and -3 for y in the expression, and solve the numerator and denominator separately before simplifying the fraction. $\frac{2(-3) + 3}{-5 - (-5)} = \frac{-6 + 3}{-5 - (-5)} = \frac{-3}{0}$ = undefined, because one cannot divide by zero.