A word sentence is a relation between two or more word phrases.

It can include:

equal to
not equal to
greater than
greater than or equal to
less than
less than or equal to
or a combination of those relations.

For example:

Which of the following is a word sentence?

1. five more than x
2. five more than x is equal to 9

For number 1:
five more than x translates to x + 5.
This is not a sentence. It does not say anything about the amount x + 5, so it is not a word sentence.
For number 2:
five more than x is equal to 9 is a word sentence since it gives us a relation between the two quantities which is equal.

Thus, number 2 is a word sentence.

Now try:

Which of the following is a word sentence?

1. Three-quarters y is greater than 0 and less than 25.
2. The quotient of x by three
   
   

For number 1:
There is a relation between the two quantities so this means that it is a word sentence.

For number 2:
There is no relation so this means that it is not a word sentence.

To follow the series, please see the previous posts leading up to this one:
Part 1: https://steemit.com/mathematics/@ghostgtr/algebraic-expressions-be-the-boss-of-word-problems-part-1
Part 2: https://steemit.com/mathematics/@ghostgtr/algebraic-expressions-be-the-boss-of-word-problems-part-2

In Part 4, I will explain how to know the meaning of an algebraic sentence.

Team South Africa banner designed by @bearone