URGENT
DAU COROANE SI 30 DE PUNCTE
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m = 39 - 5 = 34 ani
f = 19 - 5 = 14 ani
34 - x = 3(14 - x)
34 - x = 42 - 3x
3x - x = 42 - 34
2x = 8
x = 4 (acum 4 ani)