x/2+9=30 - solution

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Solution for x/2+9=30 equation:

x in (-oo:+oo)

x/2+9 = 30 // - 30

x/2-30+9 = 0

1/2*x-21 = 0 // + 21

1/2*x = 21 // : 1/2

x = 21/1/2

x = 42

x = 42

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