Solve by Using Either the Addition Method or the Substitution $$\begin{array} { l } - 5 ( x + y ) = 17 - 7 y \\- 3 ( x - 3 y ) = - 24 + 4 y\end{array}$$

Q90: Solve the system. If there is

Q91: Solve the system of equations by

Q92: Solve the system by the addition

Q93: Solve by using the substitution method.

Q94: Use the matrix features on a

Q96: Graph the solution set of the

Q97: In a right triangle, one acute angle

Q98: Decide which inequality symbol (<, >,

Q99: Solve the system of equations by

Q100: Graph the solution set of the