-1/2x=20

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Solution for -1/2x=20 equation: 


x in (-oo:+oo)

(-1/2)*x = 20 // - 20

(-1/2)*x-20 = 0

-1/2*x-20 = 0 // + 20

-1/2*x = 20 // : -1/2

x = 20/(-1/2)

x = -40

x = -40

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