b/11-4b/11=21/11

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Solution for b/11-4b/11=21/11 equation: 


b in (-oo:+oo)

b/11-((4*b)/11) = 21/11 // - 21/11

b/11-((4*b)/11)-(21/11) = 0

b/11+(-4/11)*b-21/11 = 0

-3/11*b-21/11 = 0 // + 21/11

-3/11*b = 21/11 // : -3/11

b = 21/11/(-3/11)

b = -7

b = -7

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