8+7b+b=80

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Solution for 8+7b+b=80 equation: 


b in (-oo:+oo)

7*b+b+8 = 80 // - 80

7*b+b-80+8 = 0

8*b-72 = 0 // + 72

8*b = 72 // : 8

b = 72/8

b = 9

b = 9

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