Which of the following equations is true:

2 x + x + 3 x = 6 x^{2}

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2 x + x + 3 x = 6 x

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2 x + x + 3 x = 6

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Solution

The correct option is C $2 x + x + 3 x = 6 x$
Let us add the given expression $2 x + x + 3 x$ by combining like terms as shown below:

$2 x + x + 3 x = (2 + 1 + 3) x$
$= 6 x$

Hence, $2 x + x + 3 x = 6 x$ is true.

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