Linear Equations in Real-World Scenarios Quick Check

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Question
Movie Theatre A has a popcorn machine with a 120-gallon capacity. It sells 7 gallons of popcorn per hour. Movie Theatre B has a popcorn machine with a 150-gallon capacity. It sells 9 gallons of popcorn per hour. Write and solve an equation to show when the two popcorn machines will have the same amount of popcorn left.(1 point)
Responses

120+7x=150+9x ; x=−15
120 plus 7 x equals 150 plus 9 x ; x equals negative 15

120−7x=150−9x ; x=15
120 minus 7 x equals 150 minus 9 x ; x equals 15

120−7x=150−9x ; x=10
120 minus 7 x equals 150 minus 9 x ; x equals 10

120x−7=150x−9 ; x=15
120 x minus 7 equals 150 x minus 9 ; x equals 15

1 answer

The correct equation to show when the two popcorn machines will have the same amount of popcorn left is:

120-7x = 150-9x ; x=15
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