Question

1. \\(\

$$\begin{cases} x - y = 4 \\\\ 2x + y = -4 \\end{cases}$$

\\)

1. \\(\

$$\begin{cases} 3y - x = 2 \\\\ -2y - x = -18 \\end{cases}$$

\\)

1. \\(\

$$\begin{cases} 5x - y = -6 \\\\ -x + y = 2 \\end{cases}$$

\\)

Explanation:

Solve Question 10 using elimination

Using the Systems of Equations and Elimination Method knowledge points

$$
LATEXBLOCK0
$$

Find y for Question 10

Using the Substitution Method knowledge point

$$
LATEXBLOCK1
$$

Solve Question 11 using elimination

Using the Systems of Equations and Elimination Method knowledge points

$$
LATEXBLOCK2
$$

Find x for Question 11

Using the Substitution Method knowledge point

$$
LATEXBLOCK3
$$

Solve Question 12 using elimination

Using the Systems of Equations and Elimination Method knowledge points

$$
LATEXBLOCK4
$$

Find y for Question 12

Using the Substitution Method knowledge point

$$
LATEXBLOCK5
$$

Answer:

Question 10

\(x = 0\), \(y = -4\)
Solution: \((0, -4)\)

Question 11

\(x = 10\), \(y = 4\)
Solution: \((10, 4)\)

Question 12

\(x = -1\), \(y = 1\)
Solution: \((-1, 1)\)