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vlada-n [284]
3 years ago
10

12+4a-3a+5a=16-7-9-2a+2a What Does "a" Equal?

Mathematics
1 answer:
Veronika [31]3 years ago
5 0
12 + 6a = 16 - 7 - 9 - 2a + 2a
12 + 6a  = 16 - 7 - 9
12 + 6a = 0
6a = -12
a = -12/6
a = -2

Answer: a = -2
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Answer:

<u>Alejandro went to 8 matinee shows and 4 evening shows.</u>

<u>Our system of equations:</u>

<u>x + y = 12</u>

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Correct statement and question:

Alejandro loves to go to the movies. He goes both at night and during the day. The cost of a matinee is 7 dollars. The cost of an evening show is 12 dollars.

Alejandro went to see a total of 12 movies and spent $ 104. How many of each type of movie did he attend? Write a system of equations.

Source:

Previous question that can be found at brainly

Step-by-step explanation:

Step 1:

Let x to represent the number of matinee shows Alejandro went to.

Let y to represent the number of evening shows Alejandro went to.

Now, let's write our system of equations:

x + y = 12

7x + 12y = 104

*********************

x = 12 - y

*********************

7 (12 - y) + 12y = 104

84 - 7y + 12y = 104

5y = 104 - 84

5y = 20

y = 20/5

<u>y = 4 ⇒ x = 12 - 4 = 8</u>

<u>Alejandro went to 8 matinee shows and 4 evening shows.</u>

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Answer:

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Step-by-step explanation:

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Answer:

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