Chapter 10 - Systems of Equations and Inequalities - Section 10.1 Systems of Linear Equations: Substitution and Elimination - 10.1 Assess Your Understanding - Page 734: 30

$\{(x,y)|y=3x-7\}$

1. Simply the second equation, divide by 3 to get $3x-y=7$ 2. We can see the above is the same as the first equation. 3. We conclude that the two equations are dependent and we can write the solution as $\{(x,y)|y=3x-7\}$ where $x$ can be any real number.