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-4x - 16x= -12

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3 Answers

-4 - 16 = -20
-20x=-12
 
-10x=-6
 
-5x=-3
 
-x=-3/5
x=3/5
Assuming there are no typos: -4x-16x = -12
 
So... -20x = -12
 
Divide both sides by -20 to isolate your variable
 
and x = -12/-20 or 3/5 =x
 
lines generally take the form of y= mx + b  (where m represents the slope and b the y intercept)
 
in the equation x = 3/5 no matter what y equals x will be the same.
 
So what you get is a vertical line at 3/5.  This line will not have a y-intercept as it never crosses that axis.  It's slope will also be undefined.
I think that one of your x terms needs to be y.
 
lets assume your equation was -4y-16x = -12
 
we know that the slope intercept formula is y = mx + b
 
so we need to get your equation into the same format
 
-4y -16x + 16x = -12 + 16x
-4y = 16x -12
 
divide each side by -4
 
-4y/(-4) = (16x - 12)/(-4)
 
which gives you (the slope intercept equation for the line)
y = -4x + 3
 
using this line and slope intercept formula you know that the slope, m =-4 and your y-intercept , b = 3
 
your y-intercept is the value of y on your line when x = 0 so you have one point (0,3)
 
You need another point to draw/graph the line
 
Now another way of looking at your slope is knowing that it is equal to the change of y divided by the change in x
 
m = (y1-y2)/(x1-x2)
 
since your slope is -4 which can be written as -4 = -4/1  using the concept above you could take your point (0,3) and know that if you moved y 4 points down on the graph and x one point to the right you would get the next point (1,-1). You can then graph your line using those two points
 
OR you could substitute in different values for x into the slope intercept equation for the line and determine a new y
 
y = -4x + 3
 
using x = 1, y = -4(1) + 3 = -4 + 3 = -1   point (1,-1)
Which is the same as the value of the point you would get from moving along the graph.  I hope this helps