Question 1065057
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Hi, my name is Sierra. It says I have to solve the system of linear equations by graphing. The equations are 4x-4y=20, y=5. 
I am not sure how to solve, please at least give the the x and y of each with the slope. Thank you
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<pre>
Hi, Sierra.

You are given these two equations:

4x - 4y = 20,      (1)
      y =  5.      (2)

Let me simplify the equation (1) by dividing its both sides by 4. You will get an equivalent system

x - y = 5,         (1')
    y = 5.         (2')

Let me explain how to solve it graphically.
From eq.(2') you have 

y = x - 5.      

It represents the straight line with the slope 1 (red line in the plot below).

The line y = 5, which is the equation (2'), is the horizontal line (green line in the plot).


{{{graph( 330, 330, -5.5, 15.5, -10.5, 10.5,
          x-5, 5
)}}}


Plots y = x - 5 (red line) and y = 5 (green line)



The solution is x = 10, y = 5  (the intersection of the thwo straight lines).

You can check the solution manually.
</pre>

"Addingup",  double check your plot and your writing!!