The algebraic expressions can be written as

The given expression is,
Answer:
It will take him

of a minute to fill the bottle.
Step-by-step explanation:
I'm really not sure this is right but..
we can solve using proportions. Cross-multiply and divide.

1.) x=4
2.)? 20=32-50
3.)x= 16 divided by 4,3+1, etc.
The intersection of two planes is always a line