1.2=2/5(b-4)

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Solution for 1.2=2/5(b-4) equation: 


b in (-oo:+oo)

1.2 = (2/5)*(b-4) // - (2/5)*(b-4)

1.2-((2/5)*(b-4)) = 0

(-2/5)*(b-4)+1.2 = 0

1.2-2/5*(b-4) = 0

1.2-2/5*(b-4) = 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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