x and y for x + 5y=4 3x+15y= -1
its for substitution and elimation
x + 5y=4
3x+15y= -1
i dont understand how to do it
It's impossible to solve this. In order to eliminate
one of the variables, you must multiply the first
equation by a number that gives the same
coefficient in both equations. Unfortunately,
if you multiply the first equation by 3 you get:
3 * ( x + 5y) = 3 * 4
3x + 15y = 12
The next step would be to subtract the second
equation from this one.
3x + 15y = 12
-(3x + 15y = -1)
----------------------
0 + 0 = 13
You have eliminated BOTH variables, leaving
something that is obviously NOT an equation.
Both equations have the same slope, -0.2, which
means they are parallel, therefore, they never
intersect.