2+1/2a-1/2=-1

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


a in (-oo:+oo)

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

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

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

1/2*a+5/2 = 0 // - 5/2

1/2*a = -5/2 // : 1/2

a = -5/2/1/2

a = -5

a = -5

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