x/2-9=11 - solution

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Solution for x/2-9=11 equation:

x in (-oo:+oo)

x/2-9 = 11 // - 11

x/2-11-9 = 0

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

1/2*x = 20 // : 1/2

x = 20/1/2

x = 40

x = 40

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