-20=7b+5b+4

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Solution for -20=7b+5b+4 equation: 


b in (-oo:+oo)

-20 = 7*b+5*b+4 // - 7*b+5*b+4

-(7*b)-(5*b)-20-4 = 0

-7*b-5*b-20-4 = 0

-12*b-24 = 0 // + 24

-12*b = 24 // : -12

b = 24/(-12)

b = -2

b = -2

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