y=-1/2x-2

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Solution for y=-1/2x-2 equation: 


x in (-oo:+oo)

y = (-1/2)*x-2 // - (-1/2)*x-2

y-((-1/2)*x)+2 = 0

(1/2)*x+y+2 = 0

1/2*x+y+2 = 0 // - y+2

1/2*x = -(y+2) // : 1/2

x = (-(y+2))/1/2

x = -2*(y+2)

x = -2*(y+2)

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