in a parallelogram, the opposite sides are congruent.
so, we can create this equation:
2x - 11 = -1 + x
2x - x = -1 + 11
x = 10
now we can find VU by plugging our x value into the expression.
VU = -1 + 10
VU = 9
hope this helped! please let me know if you are confused about anything i did :)