5+2b=21

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Solution for 5+2b=21 equation: 


b in (-oo:+oo)

2*b+5 = 21 // - 21

2*b-21+5 = 0

2*b-16 = 0 // + 16

2*b = 16 // : 2

b = 16/2

b = 8

b = 8

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