The admission fee at an amusement park is $7.50 for children and 12.00 for adults. On a certain day, 310 people entered the park, and the admission fees collected totaled $3,180.00. How many children and how many adults were admitted?
Let the number of adults ==A
Then, the number of children ==310 - A
12A + 7.50[310 - A] ==3,180, solve for A
A==190 adults visited the amusement park
310 - 190 ==120 children visited the amusement park.