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3 years ago

5 (2x – 1) –7 = 2 (x – 3)

Mathematics

1 answer:

Sladkaya [172]3 years ago

7 0

Answer:

x−3=x−3

Step-by-step explanation:

Evaluate (2x−1)−7, then set it equal to 2.

Subtract 7 from −1 = 2x−8

Solve 2x−8=2.

Move all terms not containing x to the right side of the equation.

Add 8 to both sides of the equation=2x=2+8

Add 2 and 8=2x=10

Divide each term by 2 and simplify.

Divide each term in 2x=10 by 2=2x/2=10/2

Cancel the common factor of 2

Cancel the common factor=10/2

Divide x by 1=x=10/2

Divide 10 by 2=x=5

Remove parentheses=x−3

List all of the solutions.

(2x−1)−7=2=x=5

x−3=x−3

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Solution:

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To compare this with general equation.

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hram777 [196]

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3 years ago

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timofeeve [1]

Answer:

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Step-by-step explanation:

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3 years ago

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LenKa [72]

Given:

The given sets are:

Set a : 200, 104, 100, 160.

Set b: 270, 400, 483, 300, x.

Mean of set a: mean of set b= 3:8

To find:

The value of x.

Solution:

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$Mean=\dfrac{\text{Sum of observations}}{\text{Number of observation}}$

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$Mean=\dfrac{200+104+100+160}{4}$

$Mean=\dfrac{564}{4}$

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$Mean=\dfrac{270+400+483+300+x}{5}$

$Mean=\dfrac{1453+x}{5}$

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Mean of set a: mean of set b= 3:8

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$5640-4359
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Divide both sides by 3.

$\dfrac{1281}{3}
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$427
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3 years ago

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klemol [59]

Answer: x = 6

==============================================

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