This is algebra disguised as geometry. I object. There are much better ways to combine algebra and geometry.
Anyway, in a parallelogram the diagonals meet at their midpoints, so bisect each other. So we have two pairs of congruent segments; geometry over.
3x + 1 = x+27
79 - y = 2y + 22
We can ignore the one about x.
79 - 22 = 2y + y
57 = 3y
y = 19
Answer: 19
It depends on what context the information is used in. All of the above statements could be correct but because we don’t know the context of the information there is no way to decide which statement is truly correct
The GCF is one. I hope this helps love! :)