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marysya [2.9K]
3 years ago
12

What is the answer to 7x+5y=-66​

Mathematics
2 answers:
OverLord2011 [107]3 years ago
6 0

Since this does not have two equations, many answers are acceptable.

One of these is x = -8, y = -2.

sergejj [24]3 years ago
4 0

Answer:

The answer will be x = - 66/7 - 5y/7

Step-by-step explanation:

I'm not sure what the context of the problem is, however just shoot me another question if this seems incorrect.

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Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. Th
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The labor fee is $13.55 and each quart of oil is $2.25

Step-by-step explanation:

Let,

x be the amount of each quart of oil

y be the amount of labor fee

According to given statement;

5x+y=24.80        Eqn 1

7x+y=29.30        Eqn 2

Subtracting Eqn 1 from Eqn 2

(7x+y)-(5x+y)=29.30-24.80\\7x+y-5x-y=4.50\\2x=4.50

Dividing both sides by 2

\frac{2x}{2}=\frac{4.50}{2}\\x=2.25

Putting x=2.25 in Eqn 1

5(2.25)+y=24.80\\11.25+y=24.80\\y=24.80-11.25\\y=13.55

The labor fee is $13.55 and each quart of oil is $2.25

Keywords: linear equation, subtraction

Learn more about subtraction at:

  • brainly.com/question/116715
  • brainly.com/question/11680012

#LearnwithBrainly

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A regular polygon has 13 sides.Find was he sum of the exterior angle.
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Answer:

Step-by-step explanation:

Exterior angle = 360/n

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Answer:

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Step-by-step explanation:

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