On wednesday karla ran 3 miles less than on monday. on friday she ran twice as far as she ran on wednesday. if she ran 21 miles altogether how far did she run on friday

Karla ran 9 miles on Friday

Step-by-step explanation:

lets make # miles Karla ran on monday=x

wednesday= x-3

Friday= 2(x-3)

since total miles= 21,

2(x-3)+x-3+x=21

2x-6+2x-3=21

4x-9=21

4x=30

x= 7.5

2(7.5-3)= 2(4.5)= 9

the correct answer is 1.7