The admission fee at a zoo is $2 for children and $4 for adults. if 1800 people enter the zoo and $6000 is collected, how many adults went to the zoo?

The number of adults is

Step-by-step explanation:

Let

x------> the number of children

y------> the number of adults

we know that

-------> equation A

-------> equation B

Multiply equation A by

--------> ------> equation C

Adds equation B and equation C

x= adult, y = kid

x+y=1800

4x+2y=6000

x=1800-y now put that into the 2nd equation

4(1800-y)+2y=6000

7200-4y+2y=6000

4y-2y=7200-6000

2y=1200

y=600

x=1800-600 = 1200

 so 1200 adults and 600 kids