obreros h/d dias obrero
15 ---------- 8 ----- 12 60
10 ---------- 6 ----- 18 X cruza
15 . 8 . 12 . x = 10 . 6 . 18 . 60
X = 45
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obreros h/d dias obrero
15 ---------- 8 ----- 12 60
10 ---------- 6 ----- 18 X cruza
15 . 8 . 12 . x = 10 . 6 . 18 . 60
X = 45