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Harlamova29_29 [7]
4 years ago
14

Solve each system by elimination. -4x + 8y = -24 7x - 5y = 24

Mathematics
1 answer:
White raven [17]4 years ago
6 0

Answer:

The solution is the point (2,-2)

Step-by-step explanation:

we have

-4x+8y=-24 -----> equation A

7x-5y=24 -----> equation B

step 1

Multiply by 7 equation A both sides

7(-4x+8y)=7(-24)

-28x+56y=-168 -----> equation C

step 2

Multiply equation B by 4 both sides

4(7x-5y)=4(24)

28x-20y=96 -----> equation D

step 3

Adds equation C and equation D

-28x+56y=-168\\28x-20y=96\\-----------\\56y-20y=-168+96\\36y=-72\\y=-2

Find the value of x

substitute the value of y in any equation

equation A

-4x+8(-2)=-24\\4x=-16+24\\4x=8\\x=2

therefore

The solution is the point (2,-2)

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8 less than 14 times a number is equal to 20 times a number more than 22
Komok [63]

Answer:

The answer is x = -5

Step-by-step explanation:

In order to find the answer, we first have to put the equation into numerical terms.

14x - 8 = 20x + 22

Now we can solve this using the order of operations.

14x - 8 = 20x + 22 -----> subtract 20 x from both sides

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3 years ago
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fredd [130]
<span>2x^2+5x factor please</span>

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4 years ago
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nadya68 [22]

Answer:

For every 92 cats in the city pound, there are 144 dogs.

OR

For every 144 dogs in the city pound, there are 92 cats

Step-by-step explanation:

You didn't provide the options, so that was my best shot at it.

7 0
2 years ago
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Answer:

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Answer:

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