91Ó°ÊÓ

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {x=\frac{1}{3} y-1} \\ {x=y+5} \end{array}\right. $$

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {4 x-7 y+32=0} \\ {5 x=4 y-2} \end{array}\right. $$

Graph the solutions of each system. $$ \left\\{\begin{array}{l} {x \geq 0} \\ {y \geq 0} \\ {9 x+3 y \leq 18} \\ {3 x+6 y \leq 18} \end{array}\right. $$

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {6 x=-3 y} \\ {5 x+15=5 y} \end{array}\right. $$

Solve each system of equations by graphing. $$ \left\\{\begin{array}{l} {3 x+2 y=-8} \\ {2 x-3 y=-1} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {x=\frac{1}{2} y+2} \\ {x=y-6} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {2 a-3 b=-13} \\ {-b=-2 a-7} \end{array}\right. $$

Solve each system of equations by graphing. $$ \left\\{\begin{array}{l} {y=-3} \\ {-x+2 y=-4} \end{array}\right. $$

$$ \left\\{\begin{array}{l} {3(x+4 y)=-12} \\ {x=3 y+10} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {a-3 b=-1} \\ {-b=-2 a-2} \end{array}\right. $$