Chapter 6 - Systems of Equations and Inequalities - Chapter Review - 6-1 Solving Systems by Graphing - Page 405: 8

(-14/3, -35/3) Please see the graph.

$y = -2x-21$ $y= x-7$ $-2x-21 = x-7$ $-2x-21 + 21-x = x-7+21-x$ $-3x = 14$ $-3x/-3 = 14/-3$ $x = -14/3$ $y = x-7$ $y = -14/3 - 7$ $y = -14/3-21/3$ $y = -35/3$ The graph was created using graphing software. Red line: $y=-2x-21$ Blue line: $y=x-7$