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Anika [276]
3 years ago
10

8n + 12 - 5n = 21 n=?

Mathematics
2 answers:
insens350 [35]3 years ago
5 0

Answer:

n=3

Step-by-step explanation:

Simplifying

8n + 12 + -5n = 21

Reorder the terms:

12 + 8n + -5n = 21

Combine like terms: 8n + -5n = 3n

12 + 3n = 21

Solving

12 + 3n = 21

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-12' to each side of the equation.

12 + -12 + 3n = 21 + -12

Combine like terms: 12 + -12 = 0

0 + 3n = 21 + -12

3n = 21 + -12

Combine like terms: 21 + -12 = 9

3n = 9

Divide each side by '3'.

n = 3

Simplifying

n = 3

Nastasia [14]3 years ago
4 0

Answer:

Step-by-step explanation:

hello :

8n + 12 - 5n = 21

8n + 12 - 5n-12 = 21 -12

3n =9

n = 9/3 = 3

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erastovalidia [21]

Hello!!

\rule{300}{5}

\huge\blue{{\fbox{\tt{ANSWER:-\:}}}}

-32

\huge\red{{\underline{\overline{\textbf{MY\:EXPLANATION~!}}}}}

Apply rule:  (-a) = -a

(-8\sqrt{2}) = - 8\sqrt{2}

= -8\sqrt{2}~\frac{1}{2}\sqrt{32}

\sqrt{2}~\sqrt{32} =\sqrt{64}

= -8\sqrt{64}~\frac{1}2}

\sqrt{64} = 8

= -8 · 8 · \frac{1}{2}

Multiply the numbers: -~8 · 8= -64

=-64 · \frac{1}{2} = -32

= -32

Hope It Helps. . .

#LearnWithBrainly

\huge\blue{{\fbox{\tt{ANSWER:-\:}}}}

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6 0
3 years ago
Point G is the centroid of triangle ABC. AG = (5x+4) units and GF= (3x-1) units. What is A F?
Vika [28.1K]
<span>Because G is the centroid of the triangle, therefore AG = 2GF
That is, 5x + 4 = 2(3x - 1)
5x + 4 = 6x - 2
4 + 2 = 6x - 5x
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Answer: 51</span>
6 0
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The midpoint of is
Degger [83]

Answer:

The answer is 0/2

Step-by-step explanation:

The second y - the first y / the second x - the first x.

Step 1: 1 - 1 / 5 - 3

Step 2: 0 / 5 - 3

Step 3: 0 / 2

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Please help, Will mark brainliest
mihalych1998 [28]

Answer:

y = - 8 x + 2

Step-by-step explanation:

Use any two pairs to find the slope with

slope = (y2-y1)/(x2-x1)

for example:  (0, 2), and (1, -6)

slope = (- 6 - 2) / (1 - 0) = - 8

so the equation should look like:

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