SOLUTION: -x+y=5 x-y=10 The solution to the system of equations above is...?... (no calculations necessary) -3x+y=5 -6x+2y=10 The solution to the system of equations above is...?.

Question 475264: -x+y=5
x-y=10
The solution to the system of equations above is...?...
(no calculations necessary)
-3x+y=5
-6x+2y=10
The solution to the system of equations above is...?...
(no calculations necessary)
these are two discussion post my prof. has posted to us. I am confused on what she is asking us to do. Please help. Thank you so much!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
the equations
(1)
(2)
--------------
(1)
(2)
There is no solution to these equations
because they are parallel lines. In order to have a solution,
they must intersect.
The coefficient of is the slope, and it is for both lines
--------------
--------------
(1)
(2)
There is no solution here because these are the same equation.
If you multiply both sides of (1) by , you get the 2nd equation.

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