The solution of y-x=2 is a line through the points (0,2) and (-2,0).
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y = 0x = y + 2plug 0 in for yx = 0 + 2x = 2
x + y = -4x - y = 2x - y = 2x + y - y = 2 + yx = 2 + yx + y = -42 + y + y = -42 + 2y = -42 - 2 + 2y = -4 - 22y = -62y/2 = -6/2y = -3x = 2 + yx = 2 - 3x = -1The solution of the system is (-1, -3)
Without an equality sign the given expression is not an equation
Without a second independent equation, it's not a 'system' yet.
Without a second independent equation, it's not a 'system' yet.