12=-7b-6b-1

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Solution for 12=-7b-6b-1 equation: 


b in (-oo:+oo)

12 = -7*b-(6*b)-1 // + -7*b-(6*b)-1

6*b-(-7*b)+1+12 = 0

7*b+6*b+1+12 = 0

13*b+13 = 0 // - 13

13*b = -13 // : 13

b = -13/13

b = -1

b = -1

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