-63=4b+5b+9

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Solution for -63=4b+5b+9 equation: 


b in (-oo:+oo)

-63 = 4*b+5*b+9 // - 4*b+5*b+9

-(4*b)-(5*b)-63-9 = 0

-4*b-5*b-63-9 = 0

-9*b-72 = 0 // + 72

-9*b = 72 // : -9

b = 72/(-9)

b = -8

b = -8

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