(1/2)x=-9 - solution

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Solution for (1/2)x=-9 equation:

x in (-oo:+oo)

(1/2)*x = -9 // + 9

(1/2)*x+9 = 0

1/2*x+9 = 0 // - 9

1/2*x = -9 // : 1/2

x = -9/1/2

x = -18

x = -18

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