8+b+2b=20 - solution

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Solution for 8+b+2b=20 equation:

b in (-oo:+oo)

b+2*b+8 = 20 // - 20

b+2*b-20+8 = 0

3*b-12 = 0 // + 12

3*b = 12 // : 3

b = 12/3

b = 4

b = 4

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