ruby and will are running a team relay race. will runs twice as far as ruby. together they run 18 miles. how far did each person run?

Question

include a lets statement. then two equations either using elimination method or substitution. then show work.

Answer 1

let Ruby run r miles and Will run w miles

 

r + w = 18       (1)

 

w = 2*r            (2)

 

substituting for w in (1)

 

r + (2*r) = 18

r = 6 miles

w = 12 miles