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when graphed, the equations x + 4y = n and 5x - 2y = 10 have the same y-intercept. what is the value of n?

Guest Aug 1, 2017
 #1
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x + 4y = n and 5x - 2y = 10 

 

If we let x =  0 in the second equation, the y intercept is at  (0, -5)

 

Then, subbing these values into the first equation for x and y we have that   (0) + 4(-5)  = n  =   -20

 

The graph here confirms this : https://www.desmos.com/calculator/dcugsajo7a

 

 

cool cool cool

CPhill  Aug 1, 2017

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