Mia had 4 more cookies than Bella. If both girls ate 18 cookies altogether, how many cookies did Mia have? Alex and Ryan had 42 marbles combined. If Ryan had 8 fewer marbles than Alex, how many marbles did Alex have? Emma has $5 more than Liam. Olivia has $12 less than Emma. If the three of them have $78 total, how much money does each person have?



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