x/2+9=13 - solution

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Solution for x/2+9=13 equation:

x in (-oo:+oo)

x/2+9 = 13 // - 13

x/2-13+9 = 0

1/2*x-4 = 0 // + 4

1/2*x = 4 // : 1/2

x = 4/1/2

x = 8

x = 8

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