13+x/2=20 - solution

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Solution for 13+x/2=20 equation:

x in (-oo:+oo)

x/2+13 = 20 // - 20

x/2-20+13 = 0

1/2*x-7 = 0 // + 7

1/2*x = 7 // : 1/2

x = 7/1/2

x = 14

x = 14

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