Answer: ?=30
Explanation:
To find this answer, we first need to figure out the scale factor. We do this by dividing corresponding sides. I used sides NM and PQ. Do NM divided by PQ. 27/18=1.5. The scale factor is 1.5. Now multiply 20 by 1.5 to get the length of NL or ?. 20 * 1.5=30.