I am so confused. The GNDT says the current Formulas are:

(1/10)t-4=w
wx+25=y
w-x^2=y
10w+70=t

And the current Time Travel Variables are:

t=1440
x=11
y=25
z=0
w=136

But none of the Formulas solve correctly for any of these Time Travel Variables!

(1/10)t-4 = w
(1/10) * 1440 - 4 =? 136
140 != 136

wx+25 = y
136 * 11 + 25 =? 25
1521 != 25

w-x^2 = y
136 - 11^2 =? 25?
15 != 25

10w+70 = t
10 * 136 + 70 =? 1440?
1430 != 1440

Which is incorrect: my math or my understanding of the Formulas and Time Travel Variables??

Possibly both. As I read it, you may redefine one of the variables in terms of the others by using a Formula, but you don’t check the rest at the same time.

“Often, a Traveler may change the values of ‘x’, ‘y’, ‘z’, ‘w’, or ‘t’ as permitted by any of the legal Formulas that exist in the GNDT (provided that division by zero does not occur), then giving notice on the front page that this has happened.”

So if I use (1/10)t-4 = w, I plug in the value for t (currently 1440), evaluate the left hand side, and then get a new value for ‘w’. That new value then goes in the tracker.

Does that help, or are you pointing out a mistake that one of us made someplace?

(1/10)*1440-4 = 140 (not 136)

So the Time Travel Variables t, w, x, y, and z are inputs (except for the one output variable) into just one Traveller’s Formula but only at the moment e changes eir Formula? This will sure make auditing players’ jumps difficult.

My misunderstanding was that I assumed the Time Travel Variables and Formulas were simultaneous equations that must be true for all Travellers’ Formulas.