Respuesta :

dhiab

Answer:

3(x+7) = 3x +21

Step-by-step explanation:


gmany

Answer:

3x + 21

Step-by-step explanation:

The distributive property: a(b + c) = ab + ac

We have:

3(x + 7) = (3)(x) + (3)(7) = 3x + 21