91Ó°ÊÓ

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {3 x+2 y=3} \\ {y=2(x-8)} \end{array}\right. $$

Solve each system of equations by graphing. $$ \left\\{\begin{array}{l} {y=-4} \\ {-2 x-y=8} \end{array}\right. $$

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {4 a+7 b=2} \\ {9 a-3 b=1} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {x=7 y-10} \\ {2 x-14 y+20=0} \end{array}\right. $$

Solve each system of equations by graphing. $$ \left\\{\begin{array}{l} {x+2 y=-4} \\ {x-\frac{1}{2} y=6} \end{array}\right. $$

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {5 a-7 b=6} \\ {7 a-6 b=8} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {y-1=5 x} \\ {10 x-2 y=2} \end{array}\right. $$

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

Solve the system by either the substitution or the elimination method. $$ \left\\{\begin{array}{l} {3 a-b=12.3} \\ {4 a-b=14.9} \end{array}\right. $$

Solve each system by substitution. If a system has no solution or infinitely many solutions, so state. $$ \left\\{\begin{array}{l} {4 x+1=2 x+5+y} \\ {2 x+2 y=5 x+y+6} \end{array}\right. $$