15=9-1/2x - solution

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Solution for 15=9-1/2x equation:

x in (-oo:+oo)

15 = 9-((1/2)*x) // - 9-((1/2)*x)

(1/2)*x-9+15 = 0

1/2*x+6 = 0 // - 6

1/2*x = -6 // : 1/2

x = -6/1/2

x = -12

x = -12

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