106.67t + 4763.67 = 308.8t + 2844.18
308.8t - 106.67t = 202.13
202.13t + 2844.18 = 4763.67
202.13t = 1919.49
1919.49/202.13t ≈ 9.5
t ≈ 9.5
9 years and 5 months
