The number of miles Josephina ran is 24 miles
Given the following data;
Translating the word problem into an algebraic expression, we have;
[tex]S + J = 42[/tex] .....equation 1
[tex]S = J - 6[/tex] ....equation 2
To find how many miles Josephina ran, we would solve the system of equation by using the substitution method;
Substituting eqn 2 into eqn 1, we have;
[tex]J - 6 + J = 42\\\\2J - 6 = 42\\\\2J = 42 + 6\\\\2J = 48\\\\J = \frac{48}{2}[/tex]
Josephina, J = 24 miles
Therefore, Josephina ran 24 miles.
Find more information: https://brainly.com/question/5155890