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3 years ago

If 4x - 8 = 4 , find the value of x

Mathematics

2 answers:

Irina18 [472]3 years ago

5 0

Answer:

x = 3

Step-by-step explanation:

Add 8 to both sides.

4x = 4 + 8

Simplify 4 + 8 to 12.

4x = 12

Divide both sides by 4.

x = 12 ÷ 4

Simplify 12 ÷ 4 to 3

x = 3

Wittaler [7]3 years ago

3 0

Answer:

x=3

Step-by-step explanation:

4x-8=4

4x=12

4x/4=12/4

x=3

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For f(x) = -5x + 4, what is the value of x for which f(x) = 20

Andru [333]

Answer:

- 3.2

Step-by-step explanation:

- 5x + 4 = 20

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- 5x = 16

x = 16 / - 5

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3 years ago

72 is equal to 80% of a number n. Write and solve and equation to find n. Write the percent as a decimal.

valentina_108 [34]

Well I'm not sure what the answer would be since I'm not that smart but I did get the answer of 90, I did this by dividing 72 by 80 which equals .9 and I multiplied that by 100 and got 90.

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3 years ago

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A boat heads south at 120 mph while a steamer heads east at 50 mph. If they started from the same dock and at the same time, whe

Snezhnost [94]

Answer:

1 hour after they leave

Step-by-step explanation:

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√(5²+12²)=√169 = 13

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So the distance between the boat and steamer will be increasing at 130 mph. The distance will be 130 miles after 1 hour.

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3 years ago

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What is the answer to this word problem or how would I solve it

USPshnik [31]

Its a simultaneous equation:
lets make "x" the used games and "y" the new ones

4x + 2y = 84
6x + y = 78. (multiply this by 2 to cancel out y)
12x + 2y = 156

so now we subtract them:
12x - 4x = 156 - 84
x = 9
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48/9 = how many used ones she can buy = 5. something

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3 years ago

Find the width of a rectangle 25 feet and the perimeter is 80

lukranit [14]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a rectangle with length 25 feet and perimeter 80 feet

To calculate - width of the rectangle

We know that ,

$\bold{Perimeter \: of \: rectangle = 2(l + b)} \\$

where b = width / breadth of rectangle

‎ ‎ ‎

substituting the values in the formula stated above ,

$\bold{80 = 2(25 + b)} \\ \\\bold{ \implies \: 25 + b = \cancel \frac{80}{2} } \\ \\ \bold{\implies \: 25 + b = 40 }\\ \\ \bold{\implies \: b = 40 - 25 }\\ \\\bold{ \implies \: b = 15 \: feet}$

hope helpful ~

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2 years ago

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If 4x - 8 = 4 , find the value of x​

If 4x - 8 = 4 , find the value of x