-9/7=20/7b-5/4b

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Solution for -9/7=20/7b-5/4b equation: 


b in (-oo:+oo)

-9/7 = (20/7)*b-((5/4)*b) // - (20/7)*b-((5/4)*b)

(5/4)*b-((20/7)*b)-9/7 = 0

(-20/7)*b+(5/4)*b-9/7 = 0

-45/28*b-9/7 = 0 // + 9/7

-45/28*b = 9/7 // : -45/28

b = 9/7/(-45/28)

b = -4/5

b = -4/5

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