How many hours will pass until they have the same amount of rubles

Question

If Sheelily has 80 rubles and gives away 2 per hour and Lila had 14 rubles and gains 4 per hour

Answer 1

80 - 2t = 14 + 4t

 

0 = 14 + 4t - 80 + 2t

 

0 = 6t - 66

 

66 = 6t

 

t = 11

 

After 11 hours, SHeelily has 80 - 2(11) = 80 -22 = 58

After 11 hours, Lila has 14 + 4(11) = 14 + 44 = 58