`(t_0 - 4,2)/(t_0 - 28,9) = 88200/65520`
`<=> (t_0 - 4,2)/(t_0 - 28,9) - 1 = 88200/65520 - 1`
`<=> (t_0 - 4,2)/(t_0 - 28,9) - (t_0 - 28,9)/(t_0 - 28,9) = 35/26 - 1`
`<=> (t_0 - 4,2 - t_0 + 28,9)/(t_0 - 28,9) = 35/26 - 26/26`
`<=> (24,7)/(t_0 - 28,9) = 9/26`
`<=> 24,7. 26 = 9(t_0 - 28,9)`
`<=> 642,2 = 9t_0 - 9. 28,9`
`<=> 9t_0 - 260,1 = 642,2`
`<=> 9t_0 = 642,2 + 260,1`
`<=> 9t_0 = 902,3`
`<=> t_0 = (902,3)/9`
`<=> t_0 = 9023/90`
Vậy `t_0 = 9023/90`