d= 8(7-t)
d= 6t
56 -8t = 6t
56 - 8t + 8t = 6t + 8t
56 = 14t
56/14 = 14t/14
t = 4
Courtney is traveling 8 mph to a location and 6 mph back. trip is 7 hours in total. what time did she spend at each speed???
2 answers
time going=d/8
time back=d/6
7=d/8+d/6
solve for d first.
multiply both sides by 24
24*7=3d+4d
24=d
now go back to first equations, solve for times.
time back=d/6
7=d/8+d/6
solve for d first.
multiply both sides by 24
24*7=3d+4d
24=d
now go back to first equations, solve for times.
2 answers