-4b+9=-11

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Solution for -4b+9=-11 equation: 


b in (-oo:+oo)

9-4*b = -11 // + 11

9-4*b+11 = 0

20-4*b = 0 // - 20

-4*b = -20 // : -4

b = -20/(-4)

b = 5

b = 5

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