Question

To stay in shape, Julie goes running three times a week. On Wednesday, she ran 4 miles less than on Monday. On Friday, she ran twice as far as she ran on Wednesday. If she ran 26 miles altogether, how far did she run on Friday?

Answer 1

monday=m
friday=f
wednsday=w

w=m-4
f=2w
w+m+f=26

In terms of w:
w+w+4+2w=26
w+w+2w+4=26
4w+4=26
4w=22
w=5.5

f=2w
f=5.5*2
f=11

Hope this helps :)