2a-4/2=-1

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Solution for 2a-4/2=-1 equation: 


a in (-oo:+oo)

2*a-(4/2) = -1 // + 1

2*a-(4/2)+1 = 0

2*a-2+1 = 0

2*a-1 = 0 // + 1

2*a = 1 // : 2

a = 1/2

a = 1/2

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