Question

The admission fee for a charity event is $7 for children and $10 for adults. The event was attended by 700 people and the total collected in admissions was$6400. There were how many children and how many adults.

Answer 1

x = 7
y = 10
x + y = 700
7x + 10y = 6400

10x + 10y = 7000
(-) 7x + 10y = 6400
______________
3x = 600
x = 200

200 + y = 700
y = 500