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seropon [69]
3 years ago
6

What does this equal? 5x+4=7x+2

Mathematics
2 answers:
Anna007 [38]3 years ago
5 0
5x+4=7x+2=4+-2x=2. 4+-2x=2=-2x=2. Therefore, x=1
7nadin3 [17]3 years ago
3 0
5x + 4 = 7x + 2

Subtract 5x from both sides.
4 = 2x + 2

Subtract 2 from both sides.
2 = 2x

Divide both sides by 2.
1 = x
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2 years ago
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Answer:

8428

Step-by-step explanation:

According to the Question,

  • Given, A theater has 56 rows of seats. If there are 13 seats in the first row, 18 in the 2nd row, 23 in the 3rd row.

We have a number sequence  13, 18, 23, ...

  • We can say that this is an arithmetic sequence because of the common difference 'd', is equal to 5, and the first term 'a1' is equal to 13.
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Substitute the given values into the equation to solve for the sum of the 56 rows of seats.

S_56= \frac{56}{2}[2(13)+(56-1)(5)]\\S_{56}=28\left[26+275\right]\\S_{56}=28\left[301\right]\\S_{56}=8428

Therefore, there are 8428 seats in all.

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Step-by-step explanation:

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