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

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


a in (-oo:+oo)

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

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

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

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

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

1/2*a+5/2 = 0

1/2*a+5/2 = 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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