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Travka [436]
3 years ago
15

If 3 is added to a number and the sum is tripledtripled​, the result is 27 more than the number. find the number.

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
7 0

To solve this problem, let us say that the number is called x and let us do this step by step.

 

1st step: 3 is added to the number, therefore:

x + 3

 

2nd step: the sum is tripled, therefore:

3 (x + 3)

 

3rd step: the result in the 2nd step is equal to 27 more than the original number, therefore:

3 (x + 3) = x + 27

 

4th step: find for the value of x using the equation

3 x + 9 = x + 27

3 x – x = 27 – 9

2 x = 18

x = 9

 

Answer:

The number is 9

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5 0
3 years ago
on a certain hot summer day 688 people used the public swimming pool. the daily prices are 1.75 for children and 2.00 for sdults
Virty [35]

Answer:

Number of children = x = 330

Number of adults = y = 358

Step-by-step explanation:

Let

Number of children = x

Number of adults = y

x + y = 688 (1)

1.75x + 2.00y = 1293.50 (2)

From (1)

x = 688 - y

Substitute x = 688 - y into (2)

1.75x + 2.00y = 1293.50

1.75(688 - y) + 2.00y = 1293.50

1,204 - 1.75y + 2.00y = 1293.50

- 1.75y + 2.00y = 1293.50 - 1,204

0.25y = 89.50

y = 358

Substitute y = 358 into (1)

x + y = 688

x + 358 = 688

x = 688 - 358

x = 330

Number of children = x = 330

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4 0
3 years ago
What is the equation of a line, in Slope Intercept Form, with a slope of 1/3 and passes through the point (9, 7)?
levacccp [35]

The slope-intercept form:

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m - slope

b - y-intercept

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7=\dfrac{1}{3}(9)+b

7=3+b      <em>subtract 3 from both sides</em>

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Answer: y=\dfrac{1}{3}x+4

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13/5 is the answer buddy
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Read 2 more answers
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