Solve for ti where v= df - di
tf - ti
When I did this I ended with -ti = Vtf
df - di
Is it okay if ti is negative?
+130518 v= [df - di ] / [ tf - ti ] multiply both sides by [tf - ti]
v[tf - ti] = [df - di] simplify the left side
vtf - vti = [ df - di] add vti to both sides, subtract [df - di] from both sides
vtf - [df - di ] = vti
vtf - df + di = vti divide both sides by v
[ vtf - dfi + di] / v = ti
