3=-y-1/2x

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Solution for 3=-y-1/2x equation: 


x in (-oo:+oo)

3 = -((1/2)*x)-y // + -((1/2)*x)-y

(1/2)*x+y+3 = 0

1/2*x+y+3 = 0 // - y+3

1/2*x = -(y+3) // : 1/2

x = (-(y+3))/1/2

x = -2*(y+3)

x = -2*(y+3)

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