Let x = miles that Charles rode on Tuesday, and let
y = miles he rode on Thursday.
The given data is therefore
Mon Tue Wed Thu Fri
2.2 x 3.8 y 5.4
Because Charles rode 1.6 more miles on Thursday than Tuesday, therefore
y = x + 1.6 (1)
The total miles for the week is 19 miles, therefore
2.2 + x + 3.8 + y + 5.4 = 19
x + y + 11.4 = 19
x + y = 7.6 (2)
Substitute equation (1) into equation (2).
x + (x + 1.6) = 7.6
2x + 1.6 = 7.6
2x = 6
x = 3
From (1), obtain
y = x + 1.6 = 3 + 1.6 = 4.6
Answer:
3 miles on Tuesday
4.6 miles on Thursday
