Solve each system of equations without graphing.

1. \(\begin{cases} 2v+6w=\text-36 \\ 5v+2w=1 \end{cases}\)

2. \(\begin{cases} 6t-9u=10 \\ 2t+3u=4 \\ \end{cases}\)

Select all the dot plots that appear to contain outliers.

Here is a system of equations:  \(\begin{cases} \text-x + 6y= 9 \\  x+ 6y= \text-3 \\ \end{cases}\)

Would you rather use subtraction or addition to solve the system? Explain your reasoning.

Here is a system of linear equations: \(\begin{cases} 6x-y=18 \\ 4x+2y=26 \\ \end{cases}\)

Select all the steps that would help to eliminate a variable and enable solving.

Consider this system of equations, which has one solution: \(\begin {cases} \begin{align} 2x+2y&=180\\0.1x+7y&=\hspace{2mm}78\end{align}\end{cases}\)

Here are some equivalent systems. Each one is a step in solving the original system.

1. Look at the original system and the system in Step 1.

   1. What was done to the original system to get the system in Step 1?
   2. Explain why the system in Step 1 shares a solution with the original system.

2. Look at the system in Step 1 and the system in Step 2.

   1. What was done to the system in Step 1 to get the system in Step 2?
   2. Explain why the system in Step 2 shares a solution with that in Step 1.
3. What is the solution to the original system?