Which equation represents this sentence? The sum of a number and four is triple the number.

4n = 3 + n

n + 4 = 3 + n

n + 4 = 3n

n−4=3n

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y