Chapter 2 - Section 2.1 - The Additon Property of Equality - Exercise Set - Page 100: 15

x = -9

$\frac{5}{6}x + \frac{1}{6}x$ = -9 Combine like terms: $\frac{6}{6}x$ = -9 Simplify: x = -9 Check with substitution: $\frac{5}{6}(-9) + \frac{1}{6}(-9)$ = -9 $\frac{-45}{6} + \frac{-9}{6}$ = -9 $\frac{-54}{6}$ = -9 -9 = -9