x/2+9/2+x=0 - solution

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Solution for x/2+9/2+x=0 equation:

x in (-oo:+oo)

x/2+x+9/2 = 0

3/2*x+9/2 = 0 // - 9/2

3/2*x = -9/2 // : 3/2

x = -9/2/3/2

x = -3

x = -3

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