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5/6x=x
2x=10*5/6x
2x=50/6=8,334
100: 8,33=12dni
Odp. Wtedy starczy im na 12 dni.
1-1/6=5/6
10/6=1,66
1,66*5=8,33
100:8,33=12
starczy na 12 dni :)