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)
2 5/16 = 2.31 pounds vs the 2.45 pounds
so the answer is cashews
9=3^2
3^(2x)=(3^2)^(3x-4)
3^(2x)=3^(6x-8)
2x=6x-8
0=4x-8
8=4x
2=x
Answer:
Step-by-step explanation:
The way i estimate is i first look at the dollars and i mutiply that by 4 ($1x4)
you get 4 then we look at the cent which is $0.98 i would add in about 4 times and i would get to about $3 maybe. (This is mental math)
After that add 4 and 3 and you get 7
the estimated cost is about 7-8 dollars.
exact cost is-7.92