1/2x-2y=21/2

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Solution for 1/2x-2y=21/2 equation: 


x in (-oo:+oo)

(1/2)*x-(2*y) = 21/2 // - 21/2

(1/2)*x-(2*y)-(21/2) = 0

(1/2)*x-2*y-21/2 = 0

1/2*x-2*y-21/2 = 0 // + -2*y-21/2

1/2*x = -(-2*y-21/2) // : 1/2

x = (-(-2*y-21/2))/1/2

x = 2*(21/2-(-2*y))

x = 2*(21/2-(-2*y))

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