91Ó°ÊÓ

In Exercises \(19-24\), solve the system by the method of elimination. $$ \left\\{\begin{array}{l} 6 r+5 s=3 \\ \frac{3}{2} r-\frac{5}{4} s=\frac{3}{4} \end{array}\right. $$

In Exercises 19-26, solve the system by graphing. $$ \left\\{\begin{array}{r} -2 x+y=-1 \\ x-2 y=-1 \end{array}\right. $$

In Exercises 21-26, solve the system by the method of substitution. $$ \left\\{\begin{array}{c} -5 x+4 y=14 \\ 5 x-4 y=4 \end{array}\right. $$

In Exercises \(19-24\), solve the system by the method of elimination. $$ \left\\{\begin{array}{l} \frac{1}{4} x-y=\frac{1}{2} \\ 4 x+4 y=3 \end{array}\right. $$

In Exercises 19-26, solve the system by graphing. $$ \left\\{\begin{array}{l} 2 x+y=-4 \\ 4 x-2 y=8 \end{array}\right. $$

In Exercises 23-28, sketch the graph of the system of linear inequalities. $$ \left\\{\begin{array}{r} x-7 y>-36 \\ 5 x+2 y>5 \\ 6 x+5 y>6 \end{array}\right. $$

In Exercises 21-26, solve the system by the method of substitution. $$ \left\\{\begin{aligned} 3 x-2 y &=3 \\ -6 x+4 y &=-6 \end{aligned}\right. $$

In Exercises 21-26, solve the system by the method of substitution. $$ \left\\{\begin{array}{rr} -6 x+1.5 y= & 6 \\ 8 x-2 y= & -8 \end{array}\right. $$

In Exercises 19-26, solve the system by graphing. $$ \left\\{\begin{array}{r} x-2 y=4 \\ 2 x-4 y=8 \end{array}\right. $$

In Exercises 25-28, solve the system by the method of elimination. $$ \left\\{\begin{aligned} -3 x-12 y &=3 \\ 5 x+20 y &=-5 \end{aligned}\right. $$