What is the answer to 4x-2y=0 when 4x+y=0?
This problem is for using addition to solve a system
if that makes any sense. Like if a problem was 3x-2y=5
when 4x+2y=-16, the answer would be -3,-2.
4x - 2y = 0 and 4x+y=0 -1 * (4x + y) = -1 * 0 -4x -3 = 0
-4x - y = 0
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-3y = 0
y = 0
4x - 2y = 0
4x - 2(0) = 0
4x - 0 = 0
4x = 0
x = 0
The (x, y) pair is (0,0), the origin. This is obvious
since the y-intercept for both equations is zero.
4x - 2y = 0
-2y = -4x + 0
y = 2x + 0 set x to zero, y is zero
4x + y = 0
y = -4x + 0 set x to zero, y is zero