Answer:
The answer is there it is 21 miles/ but if its wrong then below will be right.
27-23= 4+15 = 19 miles
27 needed to be deducted first to find out how many miles it took from Corwen to Mold. Then as we found 4 miles we can then work out Mold to Wrexham = 15 Then add together = 19m
Explanation:
its better if you label the 0-C = 27 C-M = 27-23 = 4 then M-W = 15 15+4 =19