Consider the equation:
$y + 7 x = 3 x - 2 y + 28$
How many variables are present in the linear equation?

One

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Two

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Three

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Four

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Solution

The correct option is A Two
$y + 7 x = 3 x - 2 y + 28$
$y + 7 x - 3 x + 2 y = 28$
$4 x + 3 y = 28$
Hence, the equation is in $2$ variables i.e, $x$ and $y$ .

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