A movie theater has 400 seats. Tickets at the theater cost $8 for students, $10 for adults, and $7 for senior citizens. On a nig
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Answer:
The solution is
Step-by-step explanation:
You are given the system of three equations:
Multiply the first equation by 4, the second equation by 3 and subtract them. Then multiply the third equation by 2 and subtract it from the second equation:
So,
Multiply the third equation by 23 and subtract it from the second equation:
Hence,
Substitute it into the second equation:
Substitute them into the first equation:
The solution is