En una feria del condado, los boletos de los adultos vendidos para$\$ 5.50$, senior citizens' tickets for $ \$4.00$, y los boletos de los niños para$\$ $. On the opening day, the number of children's and senior's tickets sold was 30 more than half the number of adults' tickets sold. The number of senior citizens' tickets sold was $?
Así es como lo solucioné, pero hice algo malo y no sé qué. $ more than four times the number of children's tickets. How many of each type of ticket were sold if the total receipts from the ticket sales were $$14,970$$$c+s=\frac 12a+30$$ $$s=4c+5$$ $ps
