What is the greatest integer value of y for which 5y - 20 < 0?

 Greatest value of  y is 3 .

Step-by-step explanation:

Given : 5y - 20 < 0.

To find : what is the greatest integer value of y

Solution : We have given that

5y - 20 < 0.

On adding both sides by 20.

5y < 20 .

On dividing by both sides 5.

y <  4.

We can see y is less than 4 ,  it mean all the values of y must be less than 4 but not including 4 like  3 ,2, 1, 0, -1, -2 so on.

So , the greatest value is 3 .

It can not be in fraction because we asked about integer.

Therefore,  greatest value of  y is 3 .