1/2n=-20 - solution

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Solution for 1/2n=-20 equation:

n in (-oo:+oo)

(1/2)*n = -20 // + 20

(1/2)*n+20 = 0

1/2*n+20 = 0 // - 20

1/2*n = -20 // : 1/2

n = -20/1/2

n = -40

n = -40

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