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gulaghasi [49]
2 years ago
13

Solve for the value of x :-4(3+x)+x=x+4​

Mathematics
2 answers:
natima [27]2 years ago
8 0

\qquad\qquad\huge\underline{{\sf Answer}}

Let's solve for x ~

\qquad \tt  \dashrightarrow \: 4(3 + x) + x = x + 4

\qquad \tt  \dashrightarrow \: 12 + 4x+ x = x + 4

\qquad \tt  \dashrightarrow \: 5x + 12 = x + 4

\qquad \tt  \dashrightarrow \: 5x  - x =  4 - 12

\qquad \tt  \dashrightarrow \: 4x =  - 8

\qquad \tt  \dashrightarrow \: x =  - 8  \div 4

\qquad   \dashrightarrow \: \boxed{  \tt x =  - 2 }

aniked [119]2 years ago
6 0

\bold{Hello!}

\large \sf \dagger \: {Explanation \: \dagger  }

<em>Let's solve for x ~</em>

<em />

<em />\sf{4(3 \: + \: x) \: + \: x = x \: + \: 4}

Step 1: Simplify both sides of the equation.

\sf{4(3 \: + \: x) \: + \: x = x \: + \: 4}

\sf{(4)(3) \: + \: (4)(x) \: + \: x = x \: + \: 4} \: (Distribute)

\sf{12 \: + \: 4x \: + \: x  = x \: + \: 4}

\sf{(4x \: + \: x) \: + \: (12) = x \: + \: 4} \: (Combine \: Like \: Terms)

\sf{5x \: + \: 12 = x \: + \: 4}

\sf{5x \: + \: 12 = x \: + \: 4}

Step 2: Subtract x from both sides.

\sf{5x \: + \: 12 \: - \: x = x \: + \: 4 \: - \: x}

\sf{4x \: + \: 12 = 4}

Step 3: Subtract 12 from both sides.

\sf{4x \: + \: 12 \: - \: 12 = 4 \: - \: 12}

\sf{4x = -8}

Step 4: Divide both sides by 4.

\sf{\frac{4x}{4} = \frac{-8}{4}

\sf{x = -2}

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PLS HELP
Anika [276]

The chairs in the auditorium illustrates an arithmetic sequence

  • The recursive rule is:  an = an-1 + 8; a1 = 26
  • The explicit rule is:  an = 18 + 8n
  • There are 74 seats in the 7th row
  • 840 chairs can fit the auditorium

<h3>The recursive rule</h3>

From the question, we have the following sequence:

Seats: 18, 26, 34

Rewrite as:

26 = 18 + 8

34 = 26 + 8

The above means that:

The number of seats on a row is 8 added to the the number of seats on the previous row.

Hence, the recursive rule is:

an = an-1 + 8; a1 = 26

<h3>The explicit rule</h3>

In (a), we have:

a1 = 26 and d = 8

The explicit rule is calculated using:

an = a1 + (n -1) * d

This gives

an = 26 + (n - 1) * 8

Expand

an = 26 - 8 + 8n

Evaluate the difference

an = 18 + 8n

Hence, the explicit rule is:

an = 18 + 8n

<h3>The number of seats in the row 7</h3>

This means that n = 7.

So, we  have:

a7 = 18 + 8 * 7 = 74

Hence, there are 74 seats in the 7th row

<h3>The sigma notation</h3>

We have the maximum number of rows to be 12.

So, the sigma notation would be:

\sum\limits^{12}_{n=1} {18 + 8n}

The total number of seats is:

Sn = n/2(2a + (n -1) * d)

This gives

S12 = 12/2(2 * 26 + (12 -1) * 8)

S12 = 840

Hence, 840 chairs can fit the auditorium

Read more about arithmetic sequence at:

brainly.com/question/6561461

7 0
2 years ago
I can't figure out how to do <br> -5+x/3=-11
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Add 5 to both sides
5-5+x/3=5-11
0+x/3=-6
x/3=-6
times both sides by 3
3x/3=-18
x=-18
3 0
3 years ago
In 2010, the number of houses built in Town A was 25 percent greater than the number of houses built in Town B. If 70 houses wer
Stella [2.4K]

Answer:

The number of houses built in Town B is 56.

Step-by-step explanation:

We are given that in 2010, the number of houses built in Town A was 25 percent greater than the number of houses built in Town B.

Also, 70 houses were built in Town A during 210.

Let the number of houses built in Town B be 'x'.

So, according to the question;

Number of houses built in Town A = Number of houses built in Town B + 25% of the houses built in Town B

70 = x + (25\% \times x)

70 = x(1+0.25)

x=\frac{70}{1.25}

x = 56

Hence, the number of houses built in Town B is 56.

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Which transformation could NOT be used to prove that two circles are congruent to one another?
EleoNora [17]

Answer: D

Step-by-step explanation:

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The answer will be 7x^2 + 5x
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