Question: Based on 2 sets of vectors in R^4, how do I determine a system of equations? (Linear Algebra) Please help?

Consider the following 2 sets of vectors in R^4: A = {v1, v2, v3}, B = {w1, w2, v3}. You are given that A is a set of linearly independent vectors and that B is a set of linearly independent vectors.

The intersection of 2 sets is the set of elements that are common to both sets. Suppose u is in the intersection of span A and span B. Determine a system of equations that could be used to determine all such u.

Please show steps and answers so that I can learn. I am lost with maple.
Thank you so much.

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