Hi everyone, I'm new here so I hope I have this in the right category. Also, I'm terrible at math so if I'm doing something wrong could you please tell me what it is and point me in the right direction? So the question I must answer is this:

I've been using this video as a guide into how to answer corner point method questions but when I do the work I am left with these as answers, tell me if I've done them correctly:

Linear Programming - Example 2 - YouTube

1st constraint: 7x + 4y ≤ 53

I'm eliminating the x variable to solve y

7 (0) + 4y = 53

4y = 53

4y/4 = 53/4

y= 13.25Now I'm eliminating the y variable to solve x

7x + 4y ≤ 53

7x + 4(0) = 53

7x = 53

7x/7 = 53/7

x= 7.571428571428571

2nd constraint:

2x + 7y ≥ 21

y:

2(0) + 7y = 21

7y = 21

7y/7 = 21/7

y= 3

x:

2x + 7(0) = 21

2x = 21

2x/2 = 21/2

x= 10.5

3rd constraint:

2x - 3y ≥ -18

y:

2(0) - 3y = -18

-3y = -18

-3y/-3 = -18/-3

y= 6

x:

2x - 3(0) = -18

2x = -18

2x/2 = -18/2

x= -9

Now my problem is if these answers are correct, what do I do with the decimal numbers(13.25, 7.571428571428571, 10.5)? They would be impossible to sketch out on graph paper. Also an additional note, how do I figure out the point of intersection of two lines? I understand how to do everything up to that, and after that but I'm stuck on what do do with the decimal numbers. Any help would be much appreciated.