x/2+9=20

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Solution for x/2+9=20 equation: 


x in (-oo:+oo)

x/2+9 = 20 // - 20

x/2-20+9 = 0

1/2*x-11 = 0 // + 11

1/2*x = 11 // : 1/2

x = 11/1/2

x = 22

x = 22

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