Question 171666
 how do I graph these two equations on a rectangular coordinate system
2x = y - (6x8) 
2x = y - 48
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That's one equation. It's a linear equation, so its graph will be a straight line.
To graph it, find any 2 points.
Set x = 0 and find y.  Then set y=0 and find x.
@x=0, y = 48
@y=0, x = -24
Plot the 2 points, (0,48) and (-24,0) and draw a straight line thru them.  Or find any other points and do it.