$$y = y_0 + v_0\cdot d\frac{1 - d^{t}}{1 - d}$$
$y$ = final position
$y0$ = initial position
$v0$ = initial velocity
$d$ = deceleration
$t$ = elapsed time
How do I solve for $d$?
Specifically, this step is where I'm stuck:
$$\frac{y - y_0}{v_0} = d\frac{1 - d^{t}}{1 - d}$$