1) t = (60-80)/(-1) + 1600t = 20 + 1600t = 1620
2) f = 2000 + 670 + 1330f = 4000
3) d - 678 = 1300 - 400d - 678 = 900d = 900 + 678d = 1578
1) t = (60-80)/(-1) + 1600
t = 20 + 1600
t = 1620
2) f = 2000 + 670 + 1330
f = 4000
3) d - 678 = 1300 - 400
d - 678 = 900
d = 900 + 678
d = 1578