Which of the following equation is true:

2 x + x = 5 x

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2 x + 3 x = 5 x

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2 x + 3 x = 5 x^{3}

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None

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Solution

The correct option is D $2 x + 3 x = 5 x$
Let us add the given expression $2 x + 3 x$ by combining like terms as shown below:

$2 x + 3 x = (2 + 3) x = 5 x$

Hence, $2 x + 3 x = 5 x$

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