Greetings!
Answer:
31
Explanation:
This is a question about the scale factor, this can be found by simply finding the total length of a line and dividing it by one measurement.
For example, there is a line that is 98
98 ÷ 49 = 2
And to verify that the scale factor is two, divide the total length of another line:
78 ÷ 39 = 2
So you know the line that is parallel to 2x is 62, so simply divide this by 2:
62 ÷ 2 = 31
So the length is 31!
Hope this helps!