45.5=(1/2)*7*(8+b)

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Solution for 45.5=(1/2)*7*(8+b) equation: 


b in (-oo:+oo)

45.5 = 7*(1/2)*(b+8) // - 7*(1/2)*(b+8)

45.5-(7*(1/2)*(b+8)) = 0

(-7/2)*(b+8)+45.5 = 0

45.5-7/2*(b+8) = 0

45.5-7/2*(b+8) = 0

17.5-7/2*b = 0

17.5-7/2*b = 0

17.5-7/2*b = 0 // - 17.5

-7/2*b = -17.5 // : -7/2

b = -17.5/(-7/2)

b = 5

b = 5

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