Y/2+9=20 - solution

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Solution for Y/2+9=20 equation:

Y in (-oo:+oo)

Y/2+9 = 20 // - 20

Y/2-20+9 = 0

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

1/2*Y = 11 // : 1/2

Y = 11/1/2

Y = 22

Y = 22

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