Combined speed of the cars = x + x + 14 ( where x is rate of slowest car)
speed =distance / time so
2x + 14 = 950 / 5 = 190
2x + 14 = 190
2x = 176
x = 88 kph answer
Add 7 on both sides to then left side cancels out and you end up with 13x=143 then you divide 13 on both sides and get x=11
44 divided by 360 is 22 so D is your answer
The answer to 320+200 will add up to 520