Answer:
yes it is right no one is mistake
For this case we have:
"One number plus its double equals its half plus fifteen, what is the number?"
x: Let the variable that represents the unknown number
According to the statement we have:
"One number plus its double" is represented as:![x + 2x](https://tex.z-dn.net/?f=x%20%2B%202x)
"Its half plus fifteen" is represented as: ![\frac {x} {2} +15](https://tex.z-dn.net/?f=%5Cfrac%20%7Bx%7D%20%7B2%7D%20%2B15)
Then we have the following expression:
![x + 2x = \frac {x} {2} +15](https://tex.z-dn.net/?f=x%20%2B%202x%20%3D%20%5Cfrac%20%7Bx%7D%20%7B2%7D%20%2B15)
We solve the equation:
![3x = \frac {x} {2} +15\\3x- \frac {x} {2} = 15\\\frac {6x-x} {2} = 15\\\frac {5} {2} x = 15\\5x = 30\\x = \frac {30} {5}\\x = 6](https://tex.z-dn.net/?f=3x%20%3D%20%5Cfrac%20%7Bx%7D%20%7B2%7D%20%2B15%5C%5C3x-%20%5Cfrac%20%7Bx%7D%20%7B2%7D%20%3D%2015%5C%5C%5Cfrac%20%7B6x-x%7D%20%7B2%7D%20%3D%2015%5C%5C%5Cfrac%20%7B5%7D%20%7B2%7D%20x%20%3D%2015%5C%5C5x%20%3D%2030%5C%5Cx%20%3D%20%5Cfrac%20%7B30%7D%20%7B5%7D%5C%5Cx%20%3D%206)
So the number is 6
Answer:
![x = 6](https://tex.z-dn.net/?f=x%20%3D%206)
Answer: 4.86
Step-by-step explanation: Since <em>n</em> is being divide by 0.9, to get <em>n</em> by itself, we need to multiply by 0.9 on both sides of the equation.
On the right side of the equation, the 0.9's cancel and we have <em>n</em>. On the left side of the equation, we have 0.9 × 5.4 which is 4.86.
Therefore, 4.86 = n.
Answer:
8.95
Step-by-step explanation: Add the hours and divide the money by the amount of hours