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2 years ago

20 sum-points please help thanks

Mathematics

2 answers:

Angelina_Jolie [31]2 years ago

5 0

Y = x-4

-4x +3y = -3

Replace y in the second equation with the first equation:

-4x +3(x-4) = -3

Simplify:

-4x + 3x-12 = -3

Combine like terms:

-x -12 = -3

Add 12 to each side:

-x = 9

Divide both sides by -1:

x = -9

Since -9 is only in one answer choice, the answer is (-9, -13)

iogann1982 [59]2 years ago

4 0

Answer:

(-9,-13)

Step-by-step explanation:

y = x-4

-4x+3y = -3

Substitute y =x-4 into the second equation

-4x +3(x-4)= -3

Distribute

-4x+3x-12 = -3

Combine like terms

-x -12 = -3

Add 12 to each side

-x -12+12 = -3+12

-x = 9

Multiply by -1

-1*-x = 9*-1

x=-9

Now we need to find y

y= x-4

y = -9-4

y=-13

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Answer:

The farmer have at first 202 chickens.

Step-by-step explanation:

Given:

A farmer had twice as many chickens as ducks on his farm. After he sold 166 chickens and ducks, he had half as many chickens as ducks left.

Now, to find the chickens farmer have at first.

Let the chickens be $x.$

And, the ducks be $y.$

As, the farmer had twice as many chickens as ducks on his farm.

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Substituting the value of $x$ from equation (1) we get:

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By cross multiplying we get:

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Adding both sides 332 we get:

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Subtracting both sides by $y$ we get:

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Dividing both sides by 3 we get:

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