Which equations can pair with [tex]$y=3x-2$[/tex] to create a consistent and independent system?

A. [tex]x=3y-2[/tex]
B. [tex]y=-3x-2[/tex]
C. [tex]y=3x+2[/tex]
D. [tex]6x-2y=4[/tex]
E. [tex]3y-x=-2[/tex]



Answer :

Certainly! Let's analyze which equations can pair with [tex]\( y = 3x - 2 \)[/tex] to create a consistent and independent system.

1. Equation: [tex]\( x = 3y - 2 \)[/tex]

- Let's solve the system:
[tex]\[ y = 3x - 2 \quad \text{and} \quad x = 3y - 2 \][/tex]
- This system provides a solution in terms of the variables [tex]\(x\)[/tex] and [tex]\(y\)[/tex], resulting in:
[tex]\[ x = 3y - 2 \quad \text{and} \quad y = 9y - 8 \][/tex]
- Thus, the solution is consistent and independent:
[tex]\[ \{ x = 3y - 2, y = 9y - 8 \} \][/tex]

2. Equation: [tex]\( y = -3x - 2 \)[/tex]

- Let's solve the system:
[tex]\[ y = 3x - 2 \quad \text{and} \quad y = -3x - 2 \][/tex]
- This system provides a specific numeric solution:
[tex]\[ x = 0 \quad \text{and} \quad y = -2 \][/tex]
- Thus, the solution is consistent and independent:
[tex]\[ \{ x = 0, y = -2 \} \][/tex]

3. Equation: [tex]\( y = 3x + 2 \)[/tex]

- Let's solve the system:
[tex]\[ y = 3x - 2 \quad \text{and} \quad y = 3x + 2 \][/tex]
- These two equations contradict each other, implying no solution:
[tex]\[ \square \text{(no solution)} \][/tex]

4. Equation: [tex]\( 6x - 2y = 4 \)[/tex]

- Let's solve the system:
[tex]\[ y = 3x - 2 \quad \text{and} \quad 6x - 2y = 4 \][/tex]
- This system can be solved to give a relationship between [tex]\( x \)[/tex] and [tex]\( y \)[/tex]:
[tex]\[ x = \frac{y}{3} + \frac{2}{3} \][/tex]
- Thus, it results in a consistent and independent solution:
[tex]\[ \{ x = \frac{y}{3} + \frac{2}{3} \} \][/tex]

5. Equation: [tex]\( 3y - x = -2 \)[/tex]

- Let's solve the system:
[tex]\[ y = 3x - 2 \quad \text{and} \quad 3y - x = -2 \][/tex]
- This system provides a specific numeric solution:
[tex]\[ x = \frac{1}{2} \quad \text{and} \quad y = -\frac{1}{2} \][/tex]
- Thus, the solution is consistent and independent:
[tex]\[ \{ x = \frac{1}{2}, y = -\frac{1}{2} \} \][/tex]

Based on the solutions found, the equations that can pair with [tex]\( y = 3x - 2 \)[/tex] to create a consistent and independent system are:
- [tex]\( x = 3y - 2 \)[/tex]
- [tex]\( y = -3x - 2 \)[/tex]
- [tex]\( 6x - 2y = 4 \)[/tex]
- [tex]\( 3y - x = -2 \)[/tex]

The pair [tex]\( y = 3x + 2 \)[/tex] does not create a consistent and independent system when paired with [tex]\( y = 3x - 2 \)[/tex].