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timurjin [86]
3 years ago
11

Elimination method for -4x-2y=-12 4x+8y=-24

Mathematics
2 answers:
yan [13]3 years ago
8 0

\underline{+\left\{\begin{array}{ccc}-4x-2y=-12\\4x+8y=-24\end{array}\right}\ \ |\text{add both sides of equations}\\.\ \ \ \ \ \ \ 6y=-36\ \ \ \ |:6\\.\ \ \ \ \ \ \ \ \ y=-6\\\\\text{substitute the value of y to the second equation}\\\\4x+8(-6)=-24\\4x-48=-24\ \ \ |+48\\4x=24\ \ \ \ |:4\\x=6

Answer: x = 6, y = -6 → (6, -6)

Aleksandr-060686 [28]3 years ago
3 0

-4x-2y=-12

4x+8y=-24

--------------------------add

6y = -36

y = -6

Substitute y = -6 into -4x-2y=-12

-4x-2(-6) = -12

-4x + 12 = -12

-4x = -24

x = 6

Answer

x = 6 and y = -6

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Answer:

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Step-by-step explanation:

<u>Given</u>

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y - y1 = m(x - x1)

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3 years ago
1) Solve the following system of equations algebraically. Give your solution as two
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For this case we have the following system of equations:

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x ^ 2 + 7x + 12 = 2x + 8\\x ^ 2 + 7x-2x + 12-8 = 0\\x ^ 2 + 5x + 4 = 0

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4 + 1 = 5\\4 * 1 = 4

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(x + 4) (x + 1) = 0

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x_ {1} = - 4\\x_ {2} = - 1

We look for solutions for the variable "y":

y_ {1} = 2 (-4) + 8 = -8 + 8 = 0\\y_ {2} = 2 (-1) + 8 = -2 + 8 = 6

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ANswer:

(x_ {1}, y_ {1}): (- 4,0)\\(x_ {2}, y_ {2}): (- 1,6)

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Assume the number of articles produced is a.

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Answer:

True

Step-by-step explanation:

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