y-4=-1/2x

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Solution for y-4=-1/2x equation: 


x in (-oo:+oo)

y-4 = (-1/2)*x // - (-1/2)*x

y-((-1/2)*x)-4 = 0

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

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

1/2*x = -(y-4) // : 1/2

x = (-(y-4))/1/2

x = 2*(4-y)

x = 2*(4-y)

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