T=m 1g-m 1ar 1

m 1gr+m 1ar-Mu=I*β 2

-Mu=I*β' 3

I=m 1gr-m 1ar/β-β' 4

Make the data high

That formula can only be deduced in this way. You can say that 1, 2, 3 are simultaneous and the solution is 4. In fact, the effect is not very clear. It is superficial to make the data high, which may be related to the error and also to reduce the error.