Answer:
RU = 19
Explanation:
In a parallelogram QRST, the diagonals are QS and RT.
If the diagonals intersect at point U, then RT = RU + UT.
Since the diagonals of a parallelogram bisect each other, we can say that RU = UT = TU.
Therefore, to find RU, we can equate the given expressions for TU and RU, solve for x, then substitute the found value of x into the expression for RU.
Given:
Therefore:

Substitute the found value of x = 4 into the expression for RU:

Therefore, RU = 19.