-b+6+1/2b=21/2

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Solution for -b+6+1/2b=21/2 equation: 


b in (-oo:+oo)

(1/2)*b-b+6 = 21/2 // - 21/2

(1/2)*b-b-(21/2)+6 = 0

(1/2)*b-b-21/2+6 = 0

-1/2*b-9/2 = 0 // + 9/2

-1/2*b = 9/2 // : -1/2

b = 9/2/(-1/2)

b = -9

b = -9

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