4(9+5b)=16

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Solution for 4(9+5b)=16 equation: 


b in (-oo:+oo)

4*(5*b+9) = 16 // - 16

4*(5*b+9)-16 = 0

4*(5*b+9)-16 = 0

20*b+20 = 0

20*b+20 = 0

20*b+20 = 0 // - 20

20*b = -20 // : 20

b = -20/20

b = -1

b = -1

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