2a+9=-11

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Solution for 2a+9=-11 equation: 


a in (-oo:+oo)

2*a+9 = -11 // + 11

2*a+9+11 = 0

2*a+20 = 0 // - 20

2*a = -20 // : 2

a = -20/2

a = -10

a = -10

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