b/13-3b/15=8/13

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Solution for b/13-3b/15=8/13 equation: 


b in (-oo:+oo)

b/13-((3*b)/15) = 8/13 // - 8/13

b/13-((3*b)/15)-(8/13) = 0

b/13+(-1/5)*b-8/13 = 0

-8/65*b-8/13 = 0 // + 8/13

-8/65*b = 8/13 // : -8/65

b = 8/13/(-8/65)

b = -5

b = -5

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