b/2+4=9

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Solution for b/2+4=9 equation: 


b in (-oo:+oo)

b/2+4 = 9 // - 9

b/2-9+4 = 0

1/2*b-5 = 0 // + 5

1/2*b = 5 // : 1/2

b = 5/1/2

b = 10

b = 10

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