2d+8=20

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Solution for 2d+8=20 equation: 


d in (-oo:+oo)

2*d+8 = 20 // - 20

2*d-20+8 = 0

2*d-12 = 0 // + 12

2*d = 12 // : 2

d = 12/2

d = 6

d = 6

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