1-(1/2)a=3 - solution

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Solution for 1-(1/2)a=3 equation:

a in (-oo:+oo)

1-((1/2)*a) = 3 // - 3

1-((1/2)*a)-3 = 0

(-1/2)*a-3+1 = 0

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

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

a = 2/(-1/2)

a = -4

a = -4

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