b/13-7b/13=30/13

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Solution for b/13-7b/13=30/13 equation: 


b in (-oo:+oo)

b/13-((7*b)/13) = 30/13 // - 30/13

b/13-((7*b)/13)-(30/13) = 0

b/13+(-7/13)*b-30/13 = 0

-6/13*b-30/13 = 0 // + 30/13

-6/13*b = 30/13 // : -6/13

b = 30/13/(-6/13)

b = -5

b = -5

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