Answer:
![R=5N+7](https://tex.z-dn.net/?f=R%3D5N%2B7)
![\displaystyle N=\frac{R-7}{5}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20N%3D%5Cfrac%7BR-7%7D%7B5%7D)
Step-by-step explanation:
<u>Equations
</u>
The relation between the number thought by Ann (N) and the final result (R) can be expressed as
![R=5N+7](https://tex.z-dn.net/?f=R%3D5N%2B7)
So if for example, Ann thought in the number N=12, then
![R=5\times 12+7=67](https://tex.z-dn.net/?f=R%3D5%5Ctimes%2012%2B7%3D67)
If we know the value of R, it's easy to find back the value of N by solving the equation
![R=5N+7](https://tex.z-dn.net/?f=R%3D5N%2B7)
subtracting 7 on each side
![R-7=5N](https://tex.z-dn.net/?f=R-7%3D5N)
Dividing by 5
![\displaystyle N=\frac{R-7}{5}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20N%3D%5Cfrac%7BR-7%7D%7B5%7D)
So, if Ann tells Jim that R = 52, he can guess her number is
![\displaystyle N=\frac{52-7}{5}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20N%3D%5Cfrac%7B52-7%7D%7B5%7D)
![N=9](https://tex.z-dn.net/?f=N%3D9)
Answer:
what?
Step-by-step explanation:
Answer:
<h2>g = 30</h2><h2 />
Step-by-step explanation:
1/4 (g + 2) = 8
g + 2 = 8 (4)
g = 32 - 2
g = 30