0.8=2/5(b-5)

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Solution for 0.8=2/5(b-5) equation: 


b in (-oo:+oo)

0.8 = (2/5)*(b-5) // - (2/5)*(b-5)

0.8-((2/5)*(b-5)) = 0

(-2/5)*(b-5)+0.8 = 0

0.8-2/5*(b-5) = 0

0.8-2/5*(b-5) = 0

2.8-2/5*b = 0

2.8-2/5*b = 0

2.8-2/5*b = 0 // - 2.8

-2/5*b = -2.8 // : -2/5

b = -2.8/(-2/5)

b = 7

b = 7

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