9+7b+b=-7 - solution

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

b in (-oo:+oo)

7*b+b+9 = -7 // + 7

7*b+b+7+9 = 0

8*b+16 = 0 // - 16

8*b = -16 // : 8

b = -16/8

b = -2

b = -2

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