How to solve this ‘Life’ Algebra ?
The simultatneous inequality equation with 3 unknowns (t, e, m).
It has no solution but we can get the BEST approximation :
Retire after 55 before 60, then you get optimized {e, t, m} — still have good energy (e) with plenty of time (t) and sufficient pension money (m) in CPF & investment saving.
Beyond 60 if continuing to work, the solution of {e, t, m} -> {0, 0, 0}.
Mathtuition88 