-1/2a=-1

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Solution for -1/2a=-1 equation: 


a in (-oo:+oo)

(-1/2)*a = -1 // + 1

(-1/2)*a+1 = 0

1-1/2*a = 0 // - 1

-1/2*a = -1 // : -1/2

a = -1/(-1/2)

a = 2

a = 2

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