Answer:
132 people bought balcony seats and 450 people bought ground seats.
Step-by-step explanation:
We want to solve the system of equations:
![\left\{ \begin{array}{ll} 15b+10g=6480 \\ b+g=582 \end{array} \right](https://tex.z-dn.net/?f=%5Cleft%5C%7B%20%20%20%20%20%20%20%20%5Cbegin%7Barray%7D%7Bll%7D%20%20%20%20%20%20%20%20%20%20%20%2015b%2B10g%3D6480%20%5C%5C%20%20%20%20%20%20%20%20%20%20%20%20b%2Bg%3D582%20%20%20%20%20%20%20%20%5Cend%7Barray%7D%20%20%20%20%5Cright)
We can solve this by using substitution. From the second equation, we can subtract <em>b</em> from both sides:
![g=582-b](https://tex.z-dn.net/?f=g%3D582-b)
In the first equation, we can divide both sides by five:
![3b+2g=1296](https://tex.z-dn.net/?f=3b%2B2g%3D1296)
Substitute:
![3b+2(582-b)=1296](https://tex.z-dn.net/?f=3b%2B2%28582-b%29%3D1296)
Distribute:
![3b+1164-2b=1296](https://tex.z-dn.net/?f=3b%2B1164-2b%3D1296)
Simplify:
![b+1164=1296](https://tex.z-dn.net/?f=b%2B1164%3D1296)
Solve for <em>b: </em>
<em />
<em />
<em />
Using the modified equation again, substitute:
![g=582-(132)](https://tex.z-dn.net/?f=g%3D582-%28132%29)
Evaluate:
![g=450](https://tex.z-dn.net/?f=g%3D450)
Therefore, 132 people bought balcony seats and 450 people bought ground seats.