15=7b+b+7

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Solution for 15=7b+b+7 equation: 


b in (-oo:+oo)

15 = 7*b+b+7 // - 7*b+b+7

15-(7*b)-b-7 = 0

15-7*b-b-7 = 0

8-8*b = 0 // - 8

-8*b = -8 // : -8

b = -8/(-8)

b = 1

b = 1

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