y-1=-1/2(x-8)

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Solution for y-1=-1/2(x-8) equation: 


x in (-oo:+oo)

y-1 = (-1/2)*(x-8) // - (-1/2)*(x-8)

y-((-1/2)*(x-8))-1 = 0

(1/2)*(x-8)+y-1 = 0

1/2*(x-8)+y-1 = 0

1/2*(x-8)+y-1 = 0

1/2*x+y-4-1 = 0

1/2*x+y-5 = 0

1/2*x+y-5 = 0

1/2*x+y-5 = 0 // - y-5

1/2*x = -(y-5) // : 1/2

x = (-(y-5))/1/2

x = 2*(5-y)

x = 2*(5-y)

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