-4/9+b=-55/63

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Solution for -4/9+b=-55/63 equation: 


b in (-oo:+oo)

b-4/9 = -55/63 // + -55/63

b-4/9-(-55/63) = 0

b-4/9+55/63 = 0

b+3/7 = 0 // - 3/7

b = -3/7

b = -3/7

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