Answer:
14w
Explanation:
I don't know how to explain it any simpler than just to give you the answer which is 14w.
There is a more mathematical way of getting the 14w, but I'm guessing you won't like it. Use the distributive property. Put brackets around the given expression
7w + 7w = (7w + 7w)
On each side of the plus sign there is a common factor and that common factor is w
w(7 + 7) Now add the two 7s together.
14w
You could say to me, why didn't you take out the 7 to start with. You could
7 ( w + w) but w and w add up to 2w
7*2w
14 w