2,874 divided by 5 = 574.8
Since we know anything divided by 1 is that number.
We do 2,874 - 574.8 = 2,299.2
This is how we get our answer.
So,574.8 of the 1,246 tickets were Adult tickets and 2,299.2 tickets were student tickets.
750 because you take 5000 divided by 100 equals 50, and 15 times 50 equals 750
First we must convert these mixed numbers to improper fractions:


So then we need the product of these two numbers. That means to multiply:

But then we need the value of half of this product. So then let's multiply by one-half:

Then we can convert this from an improper fraction to a mixed number:

And so this number is half of the product of the initial two numbers.
X + 2y = 10 . . . (1)
6y = -3x + 30 . . . (2)
From (2), 3x + 6y = 30
3(x + 2y = 10)
3 x (1)
Since, the second equation is a multiple of the first equation, the system will have an infinitely number of solutions.