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laiz [17]
2 years ago
15

Seven more than twice a number is 23.

Mathematics
2 answers:
pishuonlain [190]2 years ago
5 0

Answer:

x=8

Step-by-step explanation:

In other words, you are looking for a number (x) that if you multiply it by two (same as twice) and then add 7, you get 23.

To solve this, you first write the problem as an algebra equation as follows: 2x + 7 = 23

Then you solve the equation by subtracting 7 from both sides, and then divide both sides by 2. Here is the math to illustrate better:

2x + 7 = 23

2x + 7 - 7 = 23 - 7

2x = 16

2x/2 = 16/2

x = 8

marissa [1.9K]2 years ago
3 0

Answer:

i think it is 16

Step-by-step explanation:

16 + 7 = 23

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Yakvenalex [24]
<h3>Answer: 120</h3>

=============================================

Explanation:

S = sum of the first four values

S/4 = 70 since we divide the sum by 4 to get the mean of the first four values

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Let x be the fifth unknown value. Adding it onto S leads to S+x = 280+x. This represents the sum of all five values.

Dividing that sum 280+x over 5 leads to the new mean 80, which leads to...

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(280+x)/5 = 80

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