Which of the following are Pair of Linear Equations in two variables?

2x + y = 2; 3x - z=2

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12x + 4y + 3 = 0; 4x + 4y + 4 = 0

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x + 2 = 0; a + 2b = 0

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x + y - 3 = 0; 4a + 2b + c = 24

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Solution

The correct option is B
12x + 4y + 3 = 0; 4x + 4y + 4 = 0

Two linear equations in the same two variables are called a pair of linear equations in two variables.

12x + 4y + 3 = 0 and 4x + 4y + 4 = 0 are linear equations in the same two variables x and y.

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3 x + 4 y = 24

\frac{x}{4} + \frac{y}{3} = 1

x, y > 0 x, y \in N

3 x + 4 y < 0

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