86=5b+4b+5

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Solution for 86=5b+4b+5 equation: 


b in (-oo:+oo)

86 = 5*b+4*b+5 // - 5*b+4*b+5

86-(5*b)-(4*b)-5 = 0

86-5*b-4*b-5 = 0

81-9*b = 0 // - 81

-9*b = -81 // : -9

b = -81/(-9)

b = 9

b = 9

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