1/2x-y=4 - solution

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

x in (-oo:+oo)

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

(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*(y+4)

x = 2*(y+4)

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