-1/2n=-90 - solution

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Solution for -1/2n=-90 equation:

n in (-oo:+oo)

(-1/2)*n = -90 // + 90

(-1/2)*n+90 = 0

90-1/2*n = 0 // - 90

-1/2*n = -90 // : -1/2

n = -90/(-1/2)

n = 180

n = 180

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