Troikina put three logs in the common stove, Pyatikina put five logs, and Bestoplivny did not put any. All three are sure that they received an equal amount of heat from the stove. In compensation for the expenses, Bestoplivny paid the neighbors 80 kopecks. How should they divide this money?
Bestoilless "received" $8 / 3$ logs, which means $1 / 3$ of a log costs 10 kopecks. Troikina "used" $8 / 3$ logs herself, and to Bestoilless from her came

$3-8 / 3=1 / 3$ of a log. Therefore, she needs to pay 10 kopecks.

## Answer

To Troikina - 10 kopecks, to Pyaterkina - 70 kopecks.