Select the linear equations from the following equations.

7 p + 6 q + 12 s = 5

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x y + y z + z x = 5

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5 x^{2} + 6 x y - 4 y^{2} = 4

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3 x + 2 y - 6 = 2

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Solution

The correct options are
A $7 p + 6 q + 12 s = 5$
D $3 x + 2 y - 6 = 2$
The degree of a linear equation is 1.

The equations, $7 p + 6 q + 12 s = 5$ and $3 x + 2 y - 6 = 2$ are linear equations as their degree is 1.

The equations, $x y + y z + z x = 5$ and $5 x^{2} + 6 x y - 4 y^{2} = 4$ are not linear equations as their degree is 2.

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