15=-4b+2b+1

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Solution for 15=-4b+2b+1 equation: 


b in (-oo:+oo)

15 = 2*b-4*b+1 // - 2*b-4*b+1

15-(-4*b)-(2*b)-1 = 0

4*b-2*b-1+15 = 0

2*b+14 = 0 // - 14

2*b = -14 // : 2

b = -14/2

b = -7

b = -7

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