-2=-7b-4b+9

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Solution for -2=-7b-4b+9 equation: 


b in (-oo:+oo)

-2 = 9-7*b-(4*b) // - 9-7*b-(4*b)

4*b-(-7*b)-9-2 = 0

7*b+4*b-9-2 = 0

11*b-11 = 0 // + 11

11*b = 11 // : 11

b = 11/11

b = 1

b = 1

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