Respuesta :

Answer:

3x+7

Step-by-step explanation:

Three times a number, let x be the number and 7 so plus 7

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Answer:

A

Step-by-step explanation:

Let that number be [tex]x[/tex].

The sum of [tex]3[/tex] times [tex]x[/tex] and [tex]7[/tex].

[tex]3 \times x +7[/tex]

[tex]3x+7[/tex]