y-0=-1/2(x-(-9))

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Solution for y-0=-1/2(x-(-9)) equation: 


x in (-oo:+oo)

y+0 = (-1/2)*(x+9) // - (-1/2)*(x+9)

y-((-1/2)*(x+9))+0 = 0

(1/2)*(x+9)+y = 0

1/2*(x+9)+y = 0

1/2*(x+9)+y = 0

1/2*x+y+9/2 = 0

1/2*x+y+9/2 = 0

1/2*x+y+9/2 = 0 // - y+9/2

1/2*x = -(y+9/2) // : 1/2

x = (-(y+9/2))/1/2

x = -2*(y+9/2)

x = -2*(y+9/2)

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