Question

How do I solve this problem quickkkkkkk

Answer 1

Explanation:

ST and RU must be equally long (as is RS and UT).

otherwise it would not be a parallelogram (with 2 pairs of parallel sides).

so,

18x - 1 = 17x

x - 1 = 0

x = 1

so, ST = RU = 18×1 - 1 = 17