Which of the following are equations?

$3 x + 4 y$

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$x = 7 y$

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$6 x + 7 y = 0$

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$x^{2} - 2 x$

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Solution

The correct options are
B
$x = 7 y$

C
$6 x + 7 y = 0$

An equation must have a sign of equality between its two sides (expressions).

In $x = 7 y$ and $6 x + 7 y = 0$ , the sign of equality is present.

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