Question

$x + 2 = 3x - 2 \\ 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 5$
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Answer 1

Answer:

I would suggest "Veteran", which has denotations of someone with prior experience, and connotations of someone who has been through hardships and survived. Seasoned/ hardened can work fine. You can also try: experienced, weathered, time-served, toughened, inured, case-hardened, annealed.