Use the distributive property to remove the parentheses.

(2-v+3x)(-7)

To apply the distributive property, you need to multiply each term inside the parentheses by the term outside the parentheses. In this case, we'll multiply each of -7 by the terms in the parentheses.

Here's how you do it:

(-7) * (2) = -14
(-7) * (-v) = 7v
(-7) * (3x) = -21x

Now, combine these results to finish the expression:

-14 + 7v - 21x

That's the expression (2 - v + 3x) multiplied by -7 using the distributive property.