Question 279094
brittany 60/6=10 mph
christina 60/9=20/3=6 2/3 mph
60x/6=60x/9+1/3
rt=rt+d
10x=20x/3+1/3
30x=20x+1
10x=1
x=1/10=6 minutes

check
10*1/10=20/3*1/10+1/3
1=2/3+1/3
1=1
ok