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liq [111]
3 years ago
11

The theater sells two types of tickets: adult tickets for $15 and

Mathematics
1 answer:
UkoKoshka [18]3 years ago
6 0

Answer:

68

Step-by-step explanation:

Let x=adult tickets and y=child tickets

1) 15x+11y=1889

2) x+y=147

multiply equation 1 by -1/11 on both sides to get:

-(15/11)x-y=-171.73

add new equation with equation 2 to get

-4/11x=-24.73

Isolate x to get:

x=67.99999

Round up to get 68 adult tickets

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