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True [87]
3 years ago
5

5x+4(-x-2) = -5x + 2(x-1)+12 solve for x

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
8 0

Answer:

\boxed{x = 4.5}

Step-by-step explanation:

\mathrm{5x + 4( - x - 2) =  - 5x + 2(x - 1) + 12}

Distribute 4 through the parentheses

Similarly, Distribute 2 through the parentheses

\mathsf{  5x - 4x - 8 =  - 5x + 2x - 2 + 12}

Collect like terms

\mathsf{ x - 8 =  - 3x - 2 + 12}

Calculate the sum

\mathsf{x - 8 =  - 3x + 10}

Move variable to L.H.S and change its sign

Similarly, Move constant to R.H.S and change its sign

\mathsf{ x + 3x = 10 + 8}

Collect like terms

\mathsf{4x = 10 + 8}

Calculate the sum

\mathsf{4x = 18}

Divide both sides of the equation by 4

\mathsf{ \frac{4x}{4}   = \frac{18}{4}}

Calculate

\mathsf{x = 4.5}

Hope I helped!

Best regards!

vivado [14]3 years ago
3 0

Hello!

Answer:

\huge\boxed{x = 4.5}

Starting with:

5x + 4(-x - 2) = -5x + 2(x - 1) + 12

Distribute terms outside of the parenthesis:

5x + 4(-x) + 4(-2) = -5x + 2(x) + 2(-1) + 12

5x - 4x - 8 = -5x + 2x - 2 + 12

Combine like terms:

x - 8 = -3x + 10

Isolate for the "x" variable by adding 3x for both sides:

4x - 8 = 10

Add 8 to both sides:

4x = 18

Divide both sides by 4:

x = 18/4

x = 4.5

Hope this helped! :)

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Advocard [28]
X²+3x-21=0

1) we solve this square equation:
x=[-3⁺₋√(9+84)] / 2=(-3⁺₋√93)/2
We have two solutions:
x₁=(-3-√93)/2
x₂=(-3+√93)/2

2) we compute the product of the 2 solutions found.
[(-3-√93)/2][(-3+√93)/2] =(-3-√93)(-3+√93) / 4=
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To mix a particular shade of purple paint, read paint and blue paint are mixed in the ratio 5:3. To make 80 gallons of this shad
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Answer:

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Step-by-step explanation:

5 parts of the whole must be red, 3 parts of the whole must be blue, and there are 5+3=8 parts in total.

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4 0
3 years ago
A refrigerator costs $580 a year to run. A family purchases a new one for $1200 that will save them 22% annually in energy costs
NeTakaya

Answer:

It will take nine years and four months for the refrigerator to pay for itself.

Step-by-step explanation:

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Since the old refrigerator costs $580 to run, we want to determine how many years it will take for 22% of $580 per year to make $1200.

22% of $580

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That is, it saved then $127.6 per year.

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because you can show the exact points an object is at

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Hope this helps!

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4 0
3 years ago
Read 2 more answers
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