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Law Incorporation [45]
3 years ago
12

Solve the system : 44 x + 15 y = 1 -7x + 5y = 22

Mathematics
2 answers:
saul85 [17]3 years ago
5 0

Answer:

Step-by-step explanation:

44x + 15y = 22                    (1)

-7x + 5y +1 = 22                  Subtract 1 from this equation

-7x + 5y = 21                        (2)  Multiply this equation by 3

-21x + 15y = 63                     (3)  Subtract (1) from (3)

<u>44x + 15y = 22</u>

-65x = 41                             Divide by - 65

x = 41/-65                            Use this value to find y.

x = -0.6308

I can't believe anyone really gave you this.

44(41/-65) + 15y = 22

-27.75 + 15y = 22

15y = 22 + 27.75

15y = 49.75

y = 3.316

I checked this with my calculator that does these sorts of questions. The answers are correct

 

Ierofanga [76]3 years ago
4 0

Answer:

x+2y=4x+2y=4 , x−y=−3x-y=-3

x+y=3x+y=3 , 2x−8y=192x-8y=19

4x+4y=14x+4y=1 , 6x−y=1

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3 years ago
Name the property used to make the conclusion. If x+ 3 = 17, then x = 14 -
zimovet [89]

Answer:

Subtraction property of inequality

Step-by-step explanation:

Step 1: Definition of Subtraction property

Subtraction property of equality refers to balancing an equation by using the same mathematical operation (minus) on both sides.

Step 2: Relate the definition above with the given question.

It can be seen from the statements in the question that 3 was subtracted from both sides of the initial equation to get:

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6 0
3 years ago
What is the solution to the system of equations? -2x + y = -5 3x – 2y = 12 A) (3, 1) B) (6, 3) C) (-2, -9) D) (-2, -1)
max2010maxim [7]

Answer:

The correct answer is D) (-2, -1)

Step-by-step explanation:

In order to solve this system of equations, start by multiplying the entire first equation by 2. Then add the two equations together. This will get the y's to cancel and allow you to solve for x.

-4x + 2y = -10

3x - 2y = 12

---------------------

-x = 2

x = -2

Now that we have the value for x, we can find y by plugging the x value into either equation.

-2x + y = -5

-2(2) + y = -5

-4 + y = -5

y = -1

6 0
3 years ago
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