1/2a-1/2=-4

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


a in (-oo:+oo)

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

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

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

1/2*a+7/2 = 0 // - 7/2

1/2*a = -7/2 // : 1/2

a = -7/2/1/2

a = -7

a = -7

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