Respuesta :
The correct answer here is that there were originally 60 miles on car B. We can work this out with the following equation -
A = B - 50B = C + 30A + 50 = BB+ 50 = C + 802A = 3C - 70
Solution: A = 110, B = 60, C = 30
A = B - 50B = C + 30A + 50 = BB+ 50 = C + 802A = 3C - 70
Solution: A = 110, B = 60, C = 30
Answer: 60 miles initially on car b
Step-by-step explanation:
The number of miles on Car A is 50 miles more than the number of miles on Car B,
a = b+50
and the number of miles on Car B is 30 miles more than the number of miles on Car C.
c = b-30
All the cars travel 50 miles in 1 hour.
All travel at 50 mph
After 1 hour, twice the number of miles Car A is 70 miles less than 3 times the number of miles on Car C.
2(a+50) = 3(c+50) - 70
2a + 100 = 3c + 150 - 70
2a = 3c + 150 - 70 - 100
2a = 3c - 20
Replace a with (b+50), replace c with (b-30)
2(b+50) = 3(b-30) - 20
2b + 100 = 3b - 90 - 20
2b + 100 = 3b - 110
2b = 3b - 110 - 100
2b = 3b - 210
210 = 3b - 2b
b = 210 mi car B initially
then
a = 210 + 50
a = 260 car A initially
and
c = 210 - 30
c = 180 mi Car C initially