Answer:
I graphed it for you. Is this what you were looking for?
We have to put values of domain to find range

![\\ \ast\sf\longmapsto D_R=[-1,0,1]](https://tex.z-dn.net/?f=%5C%5C%20%5Cast%5Csf%5Clongmapsto%20D_R%3D%5B-1%2C0%2C1%5D)



Now
![\\ \ast\sf\longmapsto R_R=[-2,1,13]](https://tex.z-dn.net/?f=%5C%5C%20%5Cast%5Csf%5Clongmapsto%20R_R%3D%5B-2%2C1%2C13%5D)
Because you are 12 you put down
12
x can be anything so if you write
12x
You can later substitute it for 3. 12(3)
Your uncle is 2 years more
12x+2 is your equation
or
12(3) + 2
One, if you take 48/6 you get x=8 :)
She will put 1/12 of juice in each bottle easy math just divide.