Answer :

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Answer:

[tex]7x+21[/tex]

Step-by-step explanation:

[tex]7(x + 3)[/tex]

[tex]7(x)+7(3)[/tex]

[tex]7x+21[/tex]

Answer:

7x + 21

Step-by-step explanation:

7 x X=7X

7 x 3=21