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olga_2 [115]
3 years ago
15

Solve 8x + c = k for x

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
6 0

Answer:

x = \frac{k-c}{8}

Step-by-step explanation:

Solve:

8x+c = k

Subtract c from both sides we have;

8x+c-c= k-c

Simplify:

8x = k-c

Divide both sides by 8 we have;

x = \frac{k-c}{8}

Therefore, the value of x is, \frac{k-c}{8}

mr Goodwill [35]3 years ago
3 0
Ok so this is how you do it.....
You need to get x by itself.
8x + c = k
Subtract c.
8x = k - c
Divide 8 from both sides.
x = k - c / 8
I hope this helps love! :)
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A rectangle is 64 cm long 40 cm wide find is area and perimeter​
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Answer:

Assuming the length to be x and the width to be y.

Since the area is 64cm, hence

x*y = 64 (equation 1)

Since the perimeter is 40cm, hence

x + x + y + y = 40

2x + 2y = 40

2(x + y) = 2(20)

x + y = 20 (equation 2)

Hence by using simultaneous equation,

x = 20 - y (equation 3)

Substituting equation 3 into equation 1, we get

(20-y)*y=64

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Tidying up the equation,

y^2 - 20y + 64 = 0

By using factorisation,

(y-16)(y-4)=0

y=16 or y=4

By substituting y=16 into equation 1,

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Therefore,

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OR

The length is 16 cm while the width is 4cm.

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7 0
3 years ago
50× 3/8 how to reduce answer to lowest te
hoa [83]

The lowest term is \frac{75}{4}.

Solution:

Given expression is 50\times\frac{3}{8}

<u>To reduce this term to the lowest term:</u>

$50\times\frac{3}{8}=\frac{50}{1}\times\frac{3}{8}

Multiply the numerator and denominator.

$50\times\frac{3}{8}=\frac{150}{8}

Now, divide the numerator and denominator by the greatest common factor.

Here 150 and 8 both have common factor 2.

So, divide numerator and denominator by 2.

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$50\times\frac{3}{8}=\frac{75}{4}

Hence the lowest term is \frac{75}{4}.

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Step-by-step explanation:

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Step-by-step explanation:

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