Respuesta :

Answer:

7x+2x

Step-by-step explanation:

hope thats right only did it for one week

Answer:

3x + 7

Step-by-step explanation:

The perimeter of a triangle is the sum of all of its side lengths. In this case, we know all of its side lengths. x + 7 + 2x. Simplify by combining like terms. 3x + 7 is the answer.

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