b*4/5b=8

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Solution for b*4/5b=8 equation: 


b in (-oo:+oo)

((4*b)/5)*b = 8 // - 8

((4*b)/5)*b-8 = 0

4/5*b^2 = 8 // : 4/5

b^2 = 10

b^2 = 10 // ^ 1/2

abs(b) = 10^(1/2)

b = 10^(1/2) or b = -10^(1/2)

b in { 10^(1/2), -10^(1/2) }

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